diff --git a/LICENSE b/LICENSE
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--- /dev/null
+++ b/LICENSE
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+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
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+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.
diff --git a/src/mididevice.cpp b/src/mididevice.cpp
index f20cefc..a813557 100644
--- a/src/mididevice.cpp
+++ b/src/mididevice.cpp
@@ -325,9 +325,131 @@ void CMIDIDevice::MIDIMessageHandler (const u8 *pMessage, size_t nLength, unsign
 			for (unsigned nTG = 0; nTG < m_pConfig->GetToneGenerators(); nTG++) {
 				if (m_ChannelMap[nTG] == ucSysExChannel || m_ChannelMap[nTG] == OmniMode) {
 					LOGNOTE("MIDI-SYSEX: channel: %u, len: %u, TG: %u",m_ChannelMap[nTG],nLength,nTG);
+
 					HandleSystemExclusive(pMessage, nLength, nCable, nTG);
 					if (nLength == 5) {
 						break; // Send dump request only to the first TG that matches the MIDI channel requested via the SysEx message device ID
+          }
+
+					// Check for TX216/TX816 style performance sysex messages
+					
+					if (pMessage[3] == 0x04)
+					{
+						// TX816/TX216 Performance SysEx message
+						uint8_t mTG = pMessage[2] & 0x0F; // mTG = module/tone generator number (0-7)
+						uint8_t par = pMessage[4];
+						uint8_t val = pMessage[5];
+
+						// For parameter 1 (Set MIDI Channel), only process for the TG with the number in pMessage[2]
+						if (par == 1) {
+							if (nTG != mTG) continue;
+						} else {
+							// For all other parameters, process for all TGs listening on the MIDI channel mTG or OmniMode
+							if (!(m_ChannelMap[nTG] == mTG || m_ChannelMap[nTG] == OmniMode)) continue;
+						}
+						LOGNOTE("MIDI-SYSEX: Assuming TX216/TX816 style performance sysex message because 4th byte is 0x04");
+
+						switch (par)
+						{
+						case 1: // MIDI Channel
+							LOGNOTE("MIDI-SYSEX: Set TG%d to MIDI Channel %d", mTG, val & 0x0F);
+							m_pSynthesizer->SetMIDIChannel(val & 0x0F, mTG);
+							break;
+						case 2: // Poly/Mono
+							LOGNOTE("MIDI-SYSEX: Set Poly/Mono %d to %d", nTG, val & 0x0F);
+							m_pSynthesizer->setMonoMode(val ? true : false, nTG);
+							break;
+						case 3: // Pitch Bend Range
+							LOGNOTE("MIDI-SYSEX: Set Pitch Bend Range %d to %d", nTG, val & 0x0F);
+							m_pSynthesizer->setPitchbendRange(val, nTG);
+							break;
+						case 4: // Pitch Bend Step
+							LOGNOTE("MIDI-SYSEX: Set Pitch Bend Step %d to %d", nTG, val & 0x0F);
+							m_pSynthesizer->setPitchbendStep(val, nTG);
+							break;
+						case 5: // Portamento Time
+							LOGNOTE("MIDI-SYSEX: Set Portamento Time %d to %d", nTG, val & 0x0F);
+							m_pSynthesizer->setPortamentoTime(val, nTG);
+							break;
+						case 6: // Portamento/Glissando
+							LOGNOTE("MIDI-SYSEX: Set Portamento/Glissando %d to %d", nTG, val & 0x0F);
+							m_pSynthesizer->setPortamentoGlissando(val, nTG);
+							break;
+						case 7: // Portamento Mode
+							LOGNOTE("MIDI-SYSEX: Set Portamento Mode %d to %d", nTG, val & 0x0F);
+							m_pSynthesizer->setPortamentoMode(val, nTG);
+							break;
+						case 9: // Mod Wheel Sensitivity
+						{
+							int scaled = (val * 99) / 15;
+							LOGNOTE("MIDI-SYSEX: Set Mod Wheel Sensitivity %d to %d (scaled %d)", nTG, val & 0x0F, scaled);
+							m_pSynthesizer->setModWheelRange(scaled, nTG);
+						}
+						break;
+						case 10: // Mod Wheel Assign
+							LOGNOTE("MIDI-SYSEX: Set Mod Wheel Assign %d to %d", nTG, val & 0x0F);
+							m_pSynthesizer->setModWheelTarget(val, nTG);
+							break;
+						case 11: // Foot Controller Sensitivity
+						{
+							int scaled = (val * 99) / 15;
+							LOGNOTE("MIDI-SYSEX: Set Foot Controller Sensitivity %d to %d (scaled %d)", nTG, val & 0x0F, scaled);
+							m_pSynthesizer->setFootControllerRange(scaled, nTG);
+						}
+						break;
+						case 12: // Foot Controller Assign
+							LOGNOTE("MIDI-SYSEX: Set Foot Controller Assign %d to %d", nTG, val & 0x0F);
+							m_pSynthesizer->setFootControllerTarget(val, nTG);
+							break;
+						case 13: // Aftertouch Sensitivity
+						{
+							int scaled = (val * 99) / 15;
+							LOGNOTE("MIDI-SYSEX: Set Aftertouch Sensitivity %d to %d (scaled %d)", nTG, val & 0x0F, scaled);
+							m_pSynthesizer->setAftertouchRange(scaled, nTG);
+						}
+						break;
+						case 14: // Aftertouch Assign
+							LOGNOTE("MIDI-SYSEX: Set Aftertouch Assign %d to %d", nTG, val & 0x0F);
+							m_pSynthesizer->setAftertouchTarget(val, nTG);
+							break;
+						case 15: // Breath Controller Sensitivity
+						{
+							int scaled = (val * 99) / 15;
+							LOGNOTE("MIDI-SYSEX: Set Breath Controller Sensitivity %d to %d (scaled %d)", nTG, val & 0x0F, scaled);
+							m_pSynthesizer->setBreathControllerRange(scaled, nTG);
+						}
+						break;
+						case 16: // Breath Controller Assign
+							LOGNOTE("MIDI-SYSEX: Set Breath Controller Assign %d to %d", nTG, val & 0x0F);
+							m_pSynthesizer->setBreathControllerTarget(val, nTG);
+							break;
+						case 26: // Audio Output Level Attenuator
+							{
+								LOGNOTE("MIDI-SYSEX: Set Audio Output Level Attenuator %d to %d", nTG, val & 0x0F);
+								// Example: F0 43 10 04 1A 00 F7 to F0 43 10 04 1A 07 F7
+								unsigned attenVal = val & 0x07;
+								// unsigned newVolume = (unsigned)(127.0 * pow(attenVal / 7.0, 2.0) + 0.5); // Logarithmic mapping
+								// But on the T816, there is an exponential (not logarithmic!) mapping, and 0 results in the same volume as 1:
+								// 7=127, 6=63, 5=31, 4=15, 3=7, 2=3, 1=1, 0=1
+								unsigned newVolume = (attenVal == 0) ? 0 : (127 >> (7 - attenVal));
+								if (newVolume == 0) newVolume = 1; // 0 is like 1 to avoid silence
+								m_pSynthesizer->SetVolume(newVolume, nTG);
+							}
+							break;
+						case 64: // Master Tuning
+							LOGNOTE("MIDI-SYSEX: Set Master Tuning");
+							// TX812 scales from -75 to +75 cents.
+							m_pSynthesizer->SetMasterTune(maplong(val, 1, 127, -37, 37), nTG); // Would need 37.5 here, due to wrong constrain on dexed_synth module?
+							break;
+						default:
+							// Unknown or unsupported parameter
+							LOGNOTE("MIDI-SYSEX: Unknown parameter %d for TG %d", par, nTG);
+							break;
+						}
+					}
+					else
+					{
+						HandleSystemExclusive(pMessage, nLength, nCable, nTG);
 					}
 				}
 			}
@@ -429,7 +551,7 @@ void CMIDIDevice::MIDIMessageHandler (const u8 *pMessage, size_t nLength, unsign
 						case MIDI_CC_SOSTENUTO:
 							m_pSynthesizer->setSostenuto (pMessage[2] >= 64, nTG);
 							break;
-		
+
 						case MIDI_CC_PORTAMENTO:
 							m_pSynthesizer->setPortamentoMode (pMessage[2] >= 64, nTG);
 							break;
@@ -437,7 +559,7 @@ void CMIDIDevice::MIDIMessageHandler (const u8 *pMessage, size_t nLength, unsign
 						case MIDI_CC_HOLD2:
 							m_pSynthesizer->setHoldMode (pMessage[2] >= 64, nTG);
 							break;
-		
+
 						case MIDI_CC_RESONANCE:
 							m_pSynthesizer->SetResonance (maplong (pMessage[2], 0, 127, 0, 99), nTG);
 							break;
@@ -453,11 +575,12 @@ void CMIDIDevice::MIDIMessageHandler (const u8 *pMessage, size_t nLength, unsign
 						case MIDI_CC_DETUNE_LEVEL:
 							if (pMessage[2] == 0)
 							{
-								// "0 to 127, with 0 being no celeste (detune) effect applied at all."
+								// 0 to 127, with 0 being no detune effect applied at all
 								m_pSynthesizer->SetMasterTune (0, nTG);
 							}
 							else
 							{
+								// Scale to -99 to +99 cents
 								m_pSynthesizer->SetMasterTune (maplong (pMessage[2], 1, 127, -99, 99), nTG);
 							}
 							break;
@@ -592,10 +715,12 @@ bool CMIDIDevice::HandleMIDISystemCC(const u8 ucCC, const u8 ucCCval)
 			if (ucCC == MIDISystemCCMap[m_nMIDISystemCCDetune][tg]) {
 				if (ucCCval == 0)
 				{
+					// 0 to 127, with 0 being no detune effect applied at all
 					m_pSynthesizer->SetMasterTune (0, tg);
 				}
 				else
 				{
+					// Scale to -99 to +99 cents
 					m_pSynthesizer->SetMasterTune (maplong (ucCCval, 1, 127, -99, 99), tg);
 				}
 				return true;
@@ -664,62 +789,6 @@ void CMIDIDevice::HandleSystemExclusive(const uint8_t* pMessage, const size_t nL
     case -11:
       LOGERR("Unknown SysEx message.");
       break;
-    case 64:
-      LOGDBG("SysEx Function parameter change: %d Value %d",pMessage[4],pMessage[5]);
-      m_pSynthesizer->setMonoMode(pMessage[5],nTG);
-      break;
-    case 65:
-      LOGDBG("SysEx Function parameter change: %d Value %d",pMessage[4],pMessage[5]);
-      m_pSynthesizer->setPitchbendRange(pMessage[5],nTG);
-      break;
-    case 66:
-      LOGDBG("SysEx Function parameter change: %d Value %d",pMessage[4],pMessage[5]);
-      m_pSynthesizer->setPitchbendStep(pMessage[5],nTG);
-      break;
-    case 67:
-      LOGDBG("SysEx Function parameter change: %d Value %d",pMessage[4],pMessage[5]);
-      m_pSynthesizer->setPortamentoMode(pMessage[5],nTG);
-      break;
-    case 68:
-      LOGDBG("SysEx Function parameter change: %d Value %d",pMessage[4],pMessage[5]);
-      m_pSynthesizer->setPortamentoGlissando(pMessage[5],nTG);
-      break;
-    case 69:
-      LOGDBG("SysEx Function parameter change: %d Value %d",pMessage[4],pMessage[5]);
-      m_pSynthesizer->setPortamentoTime(pMessage[5],nTG);
-      break;
-    case 70:
-      LOGDBG("SysEx Function parameter change: %d Value %d",pMessage[4],pMessage[5]);
-      m_pSynthesizer->setModWheelRange(pMessage[5],nTG);
-      break;
-    case 71:
-      LOGDBG("SysEx Function parameter change: %d Value %d",pMessage[4],pMessage[5]);
-      m_pSynthesizer->setModWheelTarget(pMessage[5],nTG);
-      break;
-    case 72:
-      LOGDBG("SysEx Function parameter change: %d Value %d",pMessage[4],pMessage[5]);
-      m_pSynthesizer->setFootControllerRange(pMessage[5],nTG);
-      break;
-    case 73:
-      LOGDBG("SysEx Function parameter change: %d Value %d",pMessage[4],pMessage[5]);
-      m_pSynthesizer->setFootControllerTarget(pMessage[5],nTG);
-      break;
-    case 74:
-      LOGDBG("SysEx Function parameter change: %d Value %d",pMessage[4],pMessage[5]);
-      m_pSynthesizer->setBreathControllerRange(pMessage[5],nTG);
-      break;
-    case 75:
-      LOGDBG("SysEx Function parameter change: %d Value %d",pMessage[4],pMessage[5]);
-      m_pSynthesizer->setBreathControllerTarget(pMessage[5],nTG);
-      break;
-    case 76:
-      LOGDBG("SysEx Function parameter change: %d Value %d",pMessage[4],pMessage[5]);
-      m_pSynthesizer->setAftertouchRange(pMessage[5],nTG);
-      break;
-    case 77:
-      LOGDBG("SysEx Function parameter change: %d Value %d",pMessage[4],pMessage[5]);
-      m_pSynthesizer->setAftertouchTarget(pMessage[5],nTG);
-      break;
     case 100:
       // load sysex-data into voice memory
       LOGDBG("One Voice bulk upload");
diff --git a/src/minidexed.cpp b/src/minidexed.cpp
index d63666c..51e6444 100644
--- a/src/minidexed.cpp
+++ b/src/minidexed.cpp
@@ -1305,6 +1305,10 @@ void CMiniDexed::ProcessSound (void)
 	unsigned nFrames = m_nQueueSizeFrames - m_pSoundDevice->GetQueueFramesAvail ();
 	if (nFrames >= m_nQueueSizeFrames/2)
 	{
+		// only process the minimum number of frames (== chunksize / 2)
+		// as the tg_mixer cannot process more
+		nFrames = m_nQueueSizeFrames / 2;
+
 		if (m_bProfileEnabled)
 		{
 			m_GetChunkTimer.Start ();
diff --git a/src/uimenu.cpp b/src/uimenu.cpp
index 1475342..730f320 100644
--- a/src/uimenu.cpp
+++ b/src/uimenu.cpp
@@ -1098,12 +1098,14 @@ string CUIMenu::GetOPValueString (unsigned nOPParameter, int nValue)
 
 string CUIMenu::ToVolume (int nValue)
 {
-	static const size_t MaxChars = CConfig::LCDColumns-2;
-	char VolumeBar[MaxChars+1];
-	memset (VolumeBar, 0xFF, sizeof VolumeBar);	// 0xFF is the block character
-	VolumeBar[nValue * MaxChars / 127] = '\0';
-
-	return VolumeBar;
+    constexpr size_t NumSquares = 14;
+    char VolumeBar[NumSquares + 1];
+    size_t filled = (nValue * NumSquares + 63) / 127;
+    for (size_t i = 0; i < NumSquares; ++i) {
+        VolumeBar[i] = (i < filled) ? (char)0xFF : '.';
+    }
+    VolumeBar[NumSquares] = '\0';
+    return VolumeBar;
 }
 
 string CUIMenu::ToPan (int nValue)
@@ -1394,11 +1396,11 @@ void CUIMenu::PgmUpDownHandler (TMenuEvent Event)
 				|| voiceName == "----------"
 				|| voiceName == "~~~~~~~~~~" )
 			{
-				if (Event == MenuEventPgmUp) {
-					PgmUpDownHandler (MenuEventPgmUp);
+				if (Event == MenuEventStepUp) {
+					PgmUpDownHandler (MenuEventStepUp);
 				}
-				if (Event == MenuEventPgmDown) {
-					PgmUpDownHandler (MenuEventPgmDown);
+				if (Event == MenuEventStepDown) {
+					PgmUpDownHandler (MenuEventStepDown);
 				}
 			}
 		}
@@ -2043,6 +2045,15 @@ void CUIMenu::EditMasterVolume(CUIMenu *pUIMenu, TMenuEvent Event)
     default:
         return;
     }
-    std::string valueStr = ToVolume(pUIMenu->m_pMiniDexed->GetMasterVolume127());
-    pUIMenu->m_pUI->DisplayWrite("Master Volume", "", valueStr.c_str(), nValue > rParam.Minimum, nValue < rParam.Maximum);
+    unsigned lcdCols = pUIMenu->m_pConfig->GetLCDColumns();
+    unsigned barLen = (lcdCols > 2) ? lcdCols - 2 : 0;
+    std::string valueStr(barLen, '.');
+    if (barLen > 0) {
+        size_t filled = (nValue * barLen + 63) / 127;
+        for (unsigned i = 0; i < barLen; ++i) {
+            if (i < filled) valueStr[i] = (char)0xFF;
+        }
+    }
+    // Do NOT add < or > here; let DisplayWrite handle it
+    pUIMenu->m_pUI->DisplayWrite("Master Volume", "", valueStr.c_str(), true, true);
 }
diff --git a/updater.py b/updater.py
index bc33058..69d53c6 100644
--- a/updater.py
+++ b/updater.py
@@ -87,11 +87,61 @@ def extract_zip(zip_path):
         zip_ref.extractall(extract_path)
     return extract_path
 
+# Function to download the latest release asset using GitHub API
+def download_latest_release_github_api(release_type):
+    """
+    release_type: 'latest' or 'continuous'
+    Returns: path to downloaded zip or None
+    """
+    import json
+    headers = {'Accept': 'application/vnd.github.v3+json'}
+    repo = 'probonopd/MiniDexed'
+    if release_type == 'latest':
+        api_url = f'https://api.github.com/repos/{repo}/releases/latest'
+        resp = requests.get(api_url, headers=headers)
+        if resp.status_code != 200:
+            print(f"GitHub API error: {resp.status_code}")
+            return None
+        release = resp.json()
+        assets = release.get('assets', [])
+    elif release_type == 'continuous':
+        api_url = f'https://api.github.com/repos/{repo}/releases'
+        resp = requests.get(api_url, headers=headers)
+        if resp.status_code != 200:
+            print(f"GitHub API error: {resp.status_code}")
+            return None
+        releases = resp.json()
+        release = next((r for r in releases if 'continuous' in (r.get('tag_name','')+r.get('name','')).lower()), None)
+        if not release:
+            print("No continuous release found.")
+            return None
+        assets = release.get('assets', [])
+    else:
+        print(f"Unknown release type: {release_type}")
+        return None
+    asset = next((a for a in assets if a['name'].startswith('MiniDexed') and a['name'].endswith('.zip')), None)
+    if not asset:
+        print("No MiniDexed*.zip asset found in release.")
+        return None
+    url = asset['browser_download_url']
+    print(f"Downloading asset: {asset['name']} from {url}")
+    resp = requests.get(url, stream=True)
+    if resp.status_code == 200:
+        zip_path = os.path.join(TEMP_DIR, asset['name'])
+        with open(zip_path, 'wb') as f:
+            for chunk in resp.iter_content(chunk_size=8192):
+                f.write(chunk)
+        return zip_path
+    print(f"Failed to download asset: {resp.status_code}")
+    return None
+
 if __name__ == "__main__":
     parser = argparse.ArgumentParser(description="MiniDexed Updater")
     parser.add_argument("-v", action="store_true", help="Enable verbose FTP debug output")
     parser.add_argument("--ip", type=str, help="IP address of the device to upload to (skip mDNS discovery)")
     parser.add_argument("--version", type=int, choices=[1,2,3], help="Version to upload: 1=Latest official, 2=Continuous, 3=Local build (skip prompt)")
+    parser.add_argument("--pr", type=str, help="Pull request number or URL to fetch build artifacts from PR comment")
+    parser.add_argument("--github-token", type=str, help="GitHub personal access token for downloading PR artifacts (optional, can also use GITHUB_TOKEN env var)")
     args = parser.parse_args()
 
     import time
@@ -100,6 +150,9 @@ if __name__ == "__main__":
     local_kernel_imgs = [f for f in os.listdir(local_kernel_dir) if f.startswith('kernel') and f.endswith('.img')]
     has_local_build = len(local_kernel_imgs) > 0
 
+    # Get GitHub token from argument or environment
+    github_token = args.github_token or os.environ.get("GITHUB_TOKEN")
+
     # Ask user which release to download (numbered choices)
     release_options = [
         ("Latest official release", "https://github.com/probonopd/MiniDexed/releases/expanded_assets/latest"),
@@ -118,61 +171,137 @@ if __name__ == "__main__":
         print("Which release do you want to update?")
         for idx, (desc, _) in enumerate(release_options):
             print(f"  [{idx+1}] {desc}")
+        print("  [PR] Pull request build (enter PR number or URL)")
         while True:
-            choice = input(f"Enter the number of your choice (1-{len(release_options)}): ").strip()
+            choice = input(f"Enter the number of your choice (1-{len(release_options)}) or PR number: ").strip()
             if choice.isdigit() and 1 <= int(choice) <= len(release_options):
                 selected_idx = int(choice)-1
                 github_url = release_options[selected_idx][1]
+                args.pr = None
+                break
+            # Accept PR number, #NNN, or PR URL
+            pr_match = re.match(r'^(#?\d+|https?://github.com/[^/]+/[^/]+/pull/\d+)$', choice)
+            if pr_match:
+                args.pr = choice
+                selected_idx = None
+                github_url = None
                 break
-            print("Invalid selection. Please enter a valid number.")
+            print("Invalid selection. Please enter a valid number or PR number/URL.")
 
     # If local build is selected, skip all GitHub/zip logic and do not register cleanup
     use_local_build = has_local_build and selected_idx == len(release_options)-1
-    if use_local_build:
+    if args.pr:
+        # Extract PR number from input (accepts URL, #899, or 899)
+        import re
+        pr_input = args.pr.strip()
+        m = re.search(r'(\d+)$', pr_input)
+        if not m:
+            print(f"Could not parse PR number from: {pr_input}")
+            sys.exit(1)
+        pr_number = m.group(1)
+        # Fetch PR page HTML
+        pr_url = f"https://github.com/probonopd/MiniDexed/pull/{pr_number}"
+        print(f"Fetching PR page: {pr_url}")
+        resp = requests.get(pr_url)
+        if resp.status_code != 200:
+            print(f"Failed to fetch PR page: {resp.status_code}")
+            sys.exit(1)
+        html = resp.text
+        # Find all 'Build for testing' artifact blocks (look for <p dir="auto">Build for testing: ...</p>)
+        import html as ihtml
+        import re
+        pattern = re.compile(r'<p dir="auto">Build for testing:(.*?)Use at your own risk\.', re.DOTALL)
+        matches = pattern.findall(html)
+        if not matches:
+            print("No build artifact links found in PR comment.")
+            sys.exit(1)
+        last_block = matches[-1]
+        # Find all artifact links in the last block
+        link_pattern = re.compile(r'<a href="([^"]+)">([^<]+)</a>')
+        links = link_pattern.findall(last_block)
+        if not links:
+            print("No artifact links found in PR comment block.")
+            sys.exit(1)
+        # Download both 32bit and 64bit artifacts if present
+        artifact_paths = []
+        for url, name in links:
+            print(f"Downloading artifact: {name} from {url}")
+            # Try to extract the artifact ID from the URL
+            m = re.search(r'/artifacts/(\d+)', url)
+            if m and github_token:
+                artifact_id = m.group(1)
+                api_url = f"https://api.github.com/repos/probonopd/MiniDexed/actions/artifacts/{artifact_id}/zip"
+                headers = {
+                    "Authorization": f"Bearer {github_token}",
+                    "Accept": "application/vnd.github.v3+json",
+                    "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36"
+                }
+                resp = requests.get(api_url, stream=True, headers=headers)
+                if resp.status_code == 200:
+                    local_path = os.path.join(TEMP_DIR, name + ".zip")
+                    with open(local_path, 'wb') as f:
+                        for chunk in resp.iter_content(chunk_size=8192):
+                            f.write(chunk)
+                    artifact_paths.append(local_path)
+                else:
+                    print(f"Failed to download artifact {name} via GitHub API: {resp.status_code}")
+                    print(f"Request headers: {resp.request.headers}")
+                    print(f"Response headers: {resp.headers}")
+                    print(f"Response URL: {resp.url}")
+                    print(f"Response text (first 500 chars): {resp.text[:500]}")
+            else:
+                # Fallback to direct link if no artifact ID or no token
+                headers = {}
+                if github_token:
+                    headers["Authorization"] = f"Bearer {github_token}"
+                headers["Accept"] = "application/octet-stream"
+                headers["User-Agent"] = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36"
+                resp = requests.get(url, stream=True, headers=headers)
+                if resp.status_code == 200:
+                    local_path = os.path.join(TEMP_DIR, name + ".zip")
+                    with open(local_path, 'wb') as f:
+                        for chunk in resp.iter_content(chunk_size=8192):
+                            f.write(chunk)
+                    artifact_paths.append(local_path)
+                else:
+                    print(f"Failed to download artifact {name}: {resp.status_code}")
+                    print(f"Request headers: {resp.request.headers}")
+                    print(f"Response headers: {resp.headers}")
+                    print(f"Response URL: {resp.url}")
+                    print(f"Response text (first 500 chars): {resp.text[:500]}")
+                    if not github_token:
+                        print("You may need to provide a GitHub personal access token using --github-token or the GITHUB_TOKEN environment variable.")
+        if not artifact_paths:
+            print("No artifacts downloaded.")
+            sys.exit(1)
+        # Extract all downloaded zips
+        extract_paths = []
+        for path in artifact_paths:
+            ep = extract_zip(path)
+            print(f"Extracted {path} to {ep}")
+            extract_paths.append(ep)
+        # Use the first extracted path for further logic (or merge as needed)
+        extract_path = extract_paths[0] if extract_paths else None
+        use_local_build = False
+    elif use_local_build:
         # Remove cleanup function if registered
         atexit.unregister(cleanup_temp_files)
         print("Using local build: src/kernel*.img will be uploaded.")
         extract_path = None
     else:
-        # Use the selected GitHub URL for release
-        def get_release_url(github_url):
-            print(f"Fetching release page: {github_url}")
-            response = requests.get(github_url)
-            print(f"HTTP status code: {response.status_code}")
-            if response.status_code == 200:
-                print("Successfully fetched release page. Scanning for MiniDexed*.zip links...")
-                # Find all <a ... href="..."> tags with a <span class="Truncate-text text-bold">MiniDexed*.zip</span>
-                pattern = re.compile(r'<a[^>]+href=["\']([^"\']+\.zip)["\'][^>]*>\s*<span[^>]*class=["\']Truncate-text text-bold["\'][^>]*>(MiniDexed[^<]*?\.zip)</span>', re.IGNORECASE)
-                matches = pattern.findall(response.text)
-                print(f"Found {len(matches)} candidate .zip links.")
-                for href, filename in matches:
-                    print(f"Examining link: href={href}, filename={filename}")
-                    if filename.startswith("MiniDexed") and filename.endswith(".zip"):
-                        if href.startswith('http'):
-                            print(f"Selected direct link: {href}")
-                            return href
-                        else:
-                            full_url = f"https://github.com{href}"
-                            print(f"Selected relative link, full URL: {full_url}")
-                            return full_url
-                print("No valid MiniDexed*.zip link found.")
-            else:
-                print(f"Failed to fetch release page. Status code: {response.status_code}")
-            return None
-
-        latest_release_url = get_release_url(github_url)
-        if latest_release_url:
-            print(f"Release URL: {latest_release_url}")
-            zip_path = download_latest_release(latest_release_url)
-            if zip_path:
-                print(f"Downloaded to: {zip_path}")
-                extract_path = extract_zip(zip_path)
-                print(f"Extracted to: {extract_path}")
-            else:
-                print("Failed to download the release.")
-                sys.exit(1)
+        # Use GitHub API instead of HTML parsing
+        if selected_idx == 0:
+            zip_path = download_latest_release_github_api('latest')
+        elif selected_idx == 1:
+            zip_path = download_latest_release_github_api('continuous')
+        else:
+            zip_path = None
+        if zip_path:
+            print(f"Downloaded to: {zip_path}")
+            extract_path = extract_zip(zip_path)
+            print(f"Extracted to: {extract_path}")
         else:
-            print("Failed to get the release URL.")
+            print("Failed to download the release.")
             sys.exit(1)
 
     # Ask user if they want to update Performances (default no)