diff --git a/Disp_Plus.h b/Disp_Plus.h
index d415705..ae73c13 100644
--- a/Disp_Plus.h
+++ b/Disp_Plus.h
@@ -26,7 +26,7 @@
 #ifndef DISP_PLUS_H_INCLUDED
 #define DISP_PLUS_H_INCLUDED
 
-#define STRING_BUF_SIZE 21
+#define STRING_BUFFER_SIZE 21
 
 template <class T>
 class Disp_Plus : public T
@@ -42,7 +42,7 @@ class Disp_Plus : public T
 
     void show(uint8_t y, uint8_t x, uint8_t fs, long num)
     {
-      char _buf10[STRING_BUF_SIZE];
+      char _buf10[STRING_BUFFER_SIZE];
 
       _show(y, x, fs, itoa(num, _buf10, 10), true, true);
     }
@@ -51,7 +51,7 @@ class Disp_Plus : public T
     void _show(uint8_t pos_y, uint8_t pos_x, uint8_t field_size, const char *str, bool justify_right, bool fill_zero)
     {
       {
-        char tmp[STRING_BUF_SIZE];
+        char tmp[STRING_BUFFER_SIZE];
         char *s = tmp;
         uint8_t l = strlen(str);
 
diff --git a/MicroDexed.ino b/MicroDexed.ino
index 2c2bf35..475edd6 100644
--- a/MicroDexed.ino
+++ b/MicroDexed.ino
@@ -164,18 +164,22 @@ extern LCDMenuLib2 LCDML;
 extern uint8_t menu_state;
 #endif
 
+#ifdef DISPLAY_LCD_SPI
 void change_disp_sd(bool disp)
 {
   digitalWrite(SDCARD_CS_PIN, disp);
   digitalWrite(U8X8_CS_PIN, !disp);
 }
+#endif
 
 void setup()
 {
   //while (!Serial) ; // wait for Arduino Serial Monitor
   Serial.begin(SERIAL_SPEED);
+#ifdef DISPLAY_LCD_SPI
   pinMode(SDCARD_CS_PIN, OUTPUT);
   pinMode(U8X8_CS_PIN, OUTPUT);
+#endif
   
 #ifdef ENABLE_LCD_UI
   setup_ui();
@@ -251,7 +255,9 @@ void setup()
   SPI.setMOSI(SDCARD_MOSI_PIN);
   SPI.setSCK(SDCARD_SCK_PIN);
 #endif
+#ifdef DISPLAY_LCD_SPI
   change_disp_sd(false);
+#endif
   if (!SD.begin(SDCARD_CS_PIN))
   {
     Serial.println(F("SD card not accessable."));
@@ -290,7 +296,9 @@ void setup()
     // load default SYSEX data
     load_sysex(configuration.bank, configuration.voice);
   }
+#ifdef DISPLAY_LCD_SPI
   change_disp_sd(true);
+#endif
   // Init effects
   if (!modchorus.begin(delayline, MOD_DELAY_SAMPLE_BUFFER)) {
     Serial.println(F("AudioEffectModulatedDelay - right channel begin failed"));
@@ -426,7 +434,6 @@ void loop()
     {
 #ifdef ENABLE_LCD_UI
       // LCD Menu
-      delay(1);
       LCDML.loop();
 
       // initial starts voice selection menu as default
diff --git a/config.h b/config.h
index a99a1b9..e7a1a23 100644
--- a/config.h
+++ b/config.h
@@ -110,17 +110,23 @@
 //* UI
 //*************************************************************************************************
 #define ENABLE_LCD_UI 1
+// LCD Display
+//I2C_DISPLAY only
 #define LCD_I2C_ADDRESS 0x3f
+//Display size, must be set for U8X8 as well
 #define LCD_cols  16
 #define LCD_rows  4
-// LCD Display
 
+//enable U8X8 support
 #define U8X8_DISPLAY
+//enable SPI CS switching 
+#define DISPLAY_LCD_SPI
 #define U8X8_DISPLAY_CLASS U8X8_SSD1322_NHD_256X64_4W_HW_SPI
 //#define U8X8_DISPLAY_CLASS U8X8_SSD1306_128X64_NONAME_HW_I2C
 #define U8X8_CS_PIN 9
 #define U8X8_DC_PIN 15
 #define U8X8_RESET_PIN 14
+//Standard 16x2 LCD display (SPI/PCF8874)
 //#define I2C_DISPLAY
 // [I2C] SCL: Pin 19, SDA: Pin 18 (https://www.pjrc.com/teensy/td_libs_Wire.html)
 //#define LCD_GFX 1