Small fixes.

doc/manuals/MicroDexed-Build_Manual/MicroDexed-Build_Manual.md

@@ -100,16 +100,16 @@ For the assembly of printed circuit boards you should always start with the flat
 * Single-row pin headers
 * Sockets
 * Solder the audio card
-* Solder USB-Host pin header for the Teensy-3.6
+* Solder USB-Host pin header for the Teensy-3.6 (OPTIONAL)
 * Solder the encoders
 * Insert the ICs
-* Insert the audio card
 * Insert the Teensy
-* Connect audio card
 * Connect USB-Host (OPTIONAL)
+* Insert the audio card
+* Connect audio card
+* Prepare and insert SD card
 * Connect encoders
 * Connect LCD display
-* Prepare and insert SD card
 * Test and trouble-shooting
 
 <div style="page-break-after: always"></div>
@@ -233,7 +233,7 @@ You need:
 
 <div style="page-break-after: always"></div>
 
-#### Solder USB-Host pin header for the Teensy-3.6
+#### Solder USB-Host pin header for the Teensy-3.6 (OPTIONAL)
 
 You have to cut the needed number of pins from the long single-row-headers by yourself.