diff --git a/binaries/Tag_FW_1.54.bin b/binaries/Tag_FW_1.54.bin
index 0c094b14..d36400ce 100644
Binary files a/binaries/Tag_FW_1.54.bin and b/binaries/Tag_FW_1.54.bin differ
diff --git a/binaries/Tag_FW_2.9-uc8151.bin b/binaries/Tag_FW_2.9-uc8151.bin
index 1055798c..3768cf80 100644
Binary files a/binaries/Tag_FW_2.9-uc8151.bin and b/binaries/Tag_FW_2.9-uc8151.bin differ
diff --git a/binaries/Tag_FW_2.9.bin b/binaries/Tag_FW_2.9.bin
index 63832de5..7df3a4f2 100644
Binary files a/binaries/Tag_FW_2.9.bin and b/binaries/Tag_FW_2.9.bin differ
diff --git a/binaries/Tag_FW_4.2.bin b/binaries/Tag_FW_4.2.bin
index 62d14c50..592deb62 100644
Binary files a/binaries/Tag_FW_4.2.bin and b/binaries/Tag_FW_4.2.bin differ
diff --git a/binaries/Tag_FW_Pack.bin b/binaries/Tag_FW_Pack.bin
index a497b0ae..d8da01fd 100644
Binary files a/binaries/Tag_FW_Pack.bin and b/binaries/Tag_FW_Pack.bin differ
diff --git a/tag_types.h b/tag_types.h
index 73d0fb61..ec7fc74b 100755
--- a/tag_types.h
+++ b/tag_types.h
@@ -6,6 +6,8 @@
 #define SOLUM_SEG_EU 0xF1
 #define SOLUM_NODISPLAY 0xFF
 
+#define CAPABILITY_SUPPORTS_CUSTOM_LUTS 0x04
+#define CAPABILITY_ALT_LUT_SIZE 0x08
 #define CAPABILITY_HAS_EXT_POWER 0x10
 #define CAPABILITY_HAS_WAKE_BUTTON 0x20
 #define CAPABILITY_HAS_NFC 0x40
@@ -18,6 +20,7 @@
 #define DATATYPE_IMG_RAW_1BPP 0x20         // 2888 bytes for 1.54"  / 4736 2.9" / 15000 4.2"
 #define DATATYPE_IMG_RAW_2BPP 0x21         // 5776 bytes for 1.54"  / 9472 2.9" / 30000 4.2"
 #define DATATYPE_IMG_RAW_1BPP_DIRECT 0x3F  // only for 1.54", don't write to EEPROM, but straightaway to the EPD
+#define DATATYPE_UK_SEGMENTED 0x51         // Segmented data for the UK Segmented display type
 #define DATATYPE_NFC_RAW_CONTENT 0xA0      // raw memory content for the NT3H1101
 #define DATATYPE_NFC_URL_DIRECT 0xA1       // URL format for NT3H1101
-#define DATATYPE_UK_SEGMENTED 0x51         // Segmented data for the UK Segmented display type
+#define DATATYPE_CUSTOM_LUT_OTA 0xB0       // Custom OTA updated LUT
diff --git a/zbs243_Tag_FW/Makefile b/zbs243_Tag_FW/Makefile
index 38eddeaf..5fe685aa 100644
--- a/zbs243_Tag_FW/Makefile
+++ b/zbs243_Tag_FW/Makefile
@@ -48,6 +48,13 @@ main.elf: $(OBJS)
 	objcopy $^ $@ -I ihex -O binary
 
 .PHONY: clean
+
+SOURCES += board/zbs29_ssd1619/screen.c
+SOURCES += board/zbs42_ssd1619/screen.c
+SOURCES += board/zbs154_ssd1619/screen.c
+SOURCES += board/zbs29_uc8151/screen.c
+
+
 clean:
 	rm -f $(patsubst %.c,%.asm,$(SOURCES))
 	rm -f $(patsubst %.c,%.lst,$(SOURCES))
diff --git a/zbs243_Tag_FW/builder.php b/zbs243_Tag_FW/builder.php
index d93607f6..3c2ad93c 100644
--- a/zbs243_Tag_FW/builder.php
+++ b/zbs243_Tag_FW/builder.php
@@ -23,7 +23,7 @@ $stackdisturbed = false;
 $mem = checkmem();
 while(1){
 	$errlist = array();
-	exec("make BUILD=zbs29v033 CPU=8051 SOC=zbs243 2>&1 | grep error | grep -v make", $errlist);
+	exec("make BUILD=zbs29_ssd1619 CPU=8051 SOC=zbs243 2>&1 | grep error | grep -v make", $errlist);
 	if(checkmem()!=$mem){
 		$stackdisturbed = true;
 		echo "Stack size was $mem, is now ".checkmem()." !!!\n";
diff --git a/zbs243_Tag_FW/main.c b/zbs243_Tag_FW/main.c
index ce7b32b7..2ebdcc9f 100755
--- a/zbs243_Tag_FW/main.c
+++ b/zbs243_Tag_FW/main.c
@@ -227,6 +227,14 @@ void main() {
     powerUp(INIT_EPD);
     showSplashScreen();
 
+// we've now displayed something on the screen; for the SSD1619, we are now aware of the lut-size
+#ifdef EPD_SSD1619
+    capabilities |= CAPABILITY_SUPPORTS_CUSTOM_LUTS;
+    if (dispLutSize != 7) {
+        capabilities |= CAPABILITY_ALT_LUT_SIZE;
+    }
+#endif
+
     powerUp(INIT_EPD);
     wdt30s();
     currentChannel = showChannelSelect();
diff --git a/zbs243_Tag_FW/settings.h b/zbs243_Tag_FW/settings.h
index 33e0def5..38b69be8 100755
--- a/zbs243_Tag_FW/settings.h
+++ b/zbs243_Tag_FW/settings.h
@@ -4,7 +4,7 @@
 #include <stdint.h>
 
 #define FW_VERSION 017           // version number (max 2.5.5 :) )
-#define FW_VERSION_SUFFIX "-WF"  // suffix, like -RC1 or whatever.
+#define FW_VERSION_SUFFIX "-CLUT"  // suffix, like -RC1 or whatever.
 // #define DEBUGBLOCKS                 // uncomment to enable extra debug information on the block transfers
 // #define PRINT_LUT                   // uncomment if you want the tag to print the LUT for the current temperature bracket
 #endif
\ No newline at end of file
diff --git a/zbs243_Tag_FW/syncedproto.c b/zbs243_Tag_FW/syncedproto.c
index 5b0beaf5..d504d98f 100755
--- a/zbs243_Tag_FW/syncedproto.c
+++ b/zbs243_Tag_FW/syncedproto.c
@@ -844,6 +844,39 @@ bool processAvailDataInfo(struct AvailDataInfo *__xdata avail) {
             }
             return false;
             break;
+        case DATATYPE_CUSTOM_LUT_OTA:
+            // Handle data for the NFC IC (if we have it)
+
+            // check if we actually have the capability to do OTA Luts
+            if (!(capabilities & CAPABILITY_SUPPORTS_CUSTOM_LUTS)) {
+                // looks like we don't. mark as complete and then bail!
+                powerUp(INIT_RADIO);
+                sendXferComplete();
+                powerDown(INIT_RADIO);
+                return true;
+            }
+#ifdef EPD_SSD1619
+            pr("OTA LUT received\n");
+            if (curDataInfo.dataSize == 0 && xMemEqual((const void *__xdata) & avail->dataVer, (const void *__xdata) & curDataInfo.dataVer, 8)) {
+                pr("this was the same as the last transfer, disregard\n");
+                powerUp(INIT_RADIO);
+                sendXferComplete();
+                powerDown(INIT_RADIO);
+                return true;
+            }
+            xMemCopyShort(&curDataInfo, (void *)avail, sizeof(struct AvailDataInfo));
+
+            if (getDataBlock(avail->dataSize)) {
+                powerUp(INIT_RADIO);
+                sendXferComplete();
+                powerDown(INIT_RADIO);
+                curDataInfo.dataSize = 0;  // mark as transfer not pending
+                memcpy(customLUT, sizeof(struct blockData) + blockXferBuffer, dispLutSize * 10);
+                return true;
+            }
+#endif
+            return false;
+            break;
     }
     return true;
 }
diff --git a/zbs243_Tag_FW/userinterface.c b/zbs243_Tag_FW/userinterface.c
index 1ef87c8c..a777ad8c 100755
--- a/zbs243_Tag_FW/userinterface.c
+++ b/zbs243_Tag_FW/userinterface.c
@@ -217,7 +217,7 @@ void showApplyUpdate() {
     epdPrintBegin(12, 60, EPD_DIRECTION_X, EPD_SIZE_DOUBLE, EPD_COLOR_BLACK);
 #endif
 #if (SCREEN_WIDTH == 128)
-    epdPrintBegin(48, 86, EPD_DIRECTION_Y, EPD_SIZE_DOUBLE, EPD_COLOR_BLACK);
+    epdPrintBegin(48, 220, EPD_DIRECTION_Y, EPD_SIZE_DOUBLE, EPD_COLOR_BLACK);
 #endif
 
 #if (SCREEN_WIDTH == 400)
diff --git a/zbs243_shared/board/ssd1619.c b/zbs243_shared/board/ssd1619.c
index 11081088..0dcd58b6 100755
--- a/zbs243_shared/board/ssd1619.c
+++ b/zbs243_shared/board/ssd1619.c
@@ -1,3 +1,5 @@
+#include "ssd1619.h"
+
 #include <stdbool.h>
 #include <string.h>
 
@@ -5,12 +7,11 @@
 #include "barcode.h"
 #include "board.h"
 #include "cpu.h"
-#include "ssd1619.h"
 #include "font.h"
 #include "lut.h"
 #include "printf.h"
 #include "screen.h"
-//#include "settings.h"
+// #include "settings.h"
 #include "sleep.h"
 #include "spi.h"
 #include "timer.h"
@@ -74,14 +75,16 @@ static uint8_t __xdata rbuffer[32];       // used to rotate bits around
 static uint16_t __xdata fontCurXpos = 0;  // current X value we're working with
 static uint16_t __xdata fontCurYpos = 0;  // current Y value we're working with
 static uint8_t __xdata currentLut = 0;
-static uint8_t __xdata dispLutSize = 0;
+uint8_t __xdata dispLutSize = 0;  // we'll need to expose this in the 'capabilities' flag
 
 static bool __xdata isInited = false;
 
 bool __xdata epdGPIOActive = false;
 
 #define LUT_BUFFER_SIZE 128
-uint8_t waveformbuffer[LUT_BUFFER_SIZE];
+static uint8_t waveformbuffer[LUT_BUFFER_SIZE];
+uint8_t __xdata customLUT[LUT_BUFFER_SIZE] =  {0};
+
 struct waveform10* __xdata waveform10 = (struct waveform10*)waveformbuffer;  // holds the LUT/waveform
 struct waveform* __xdata waveform7 = (struct waveform*)waveformbuffer;       // holds the LUT/waveform
 
@@ -249,7 +252,7 @@ void epdSetup() {
     commandEnd();
 
     // shortCommand1(CMD_DATA_ENTRY_MODE, 0x03);
-    //shortCommand1(CMD_BORDER_WAVEFORM_CTRL, 0xC0); // blurry edges
+    // shortCommand1(CMD_BORDER_WAVEFORM_CTRL, 0xC0); // blurry edges
     shortCommand1(CMD_BORDER_WAVEFORM_CTRL, 0x01);
     shortCommand1(CMD_TEMP_SENSOR_CONTROL, 0x80);
     shortCommand1(CMD_DISP_UPDATE_CTRL2, 0xB1);  // mode 1 (i2C)
@@ -375,6 +378,14 @@ void selectLUT(uint8_t lut) {
         return;
     }
 
+    // Handling if we received an OTA LUT
+    if (lut == EPD_LUT_OTA) {
+        memcpy(waveformbuffer, customLUT, dispLutSize * 10);
+        writeLut();
+        currentLut = lut;
+        return;
+    }
+
     if (currentLut != EPD_LUT_DEFAULT) {
         // load the 'default' LUT for the current temperature in the EPD lut register
         shortCommand1(CMD_DISP_UPDATE_CTRL2, 0xB1);  // mode 1?
@@ -399,9 +410,11 @@ void selectLUT(uint8_t lut) {
 #ifdef PRINT_LUT
         dump(waveformbuffer, LUT_BUFFER_SIZE);
 #endif
+        memcpy(customLUT, waveformbuffer, dispLutSize * 10);
     }
 
     switch (lut) {
+        default:
         case EPD_LUT_NO_REPEATS:
             lutGroupDisable(LUTGROUP_NEGATIVE);
             lutGroupDisable(LUTGROUP_FASTBLINK);
diff --git a/zbs243_shared/board/ssd1619.h b/zbs243_shared/board/ssd1619.h
old mode 100644
new mode 100755
index a94bb934..c0b8bc5c
--- a/zbs243_shared/board/ssd1619.h
+++ b/zbs243_shared/board/ssd1619.h
@@ -4,6 +4,8 @@
 #include <stdbool.h>
 #include <stdint.h>
 
+#define EPD_SSD1619
+
 #define epdSend spiTXByte
 #define EPD_DIRECTION_X false
 #define EPD_DIRECTION_Y true
@@ -21,6 +23,7 @@
 #define EPD_LUT_NO_REPEATS 1
 #define EPD_LUT_FAST_NO_REDS 2
 #define EPD_LUT_FAST 3
+#define EPD_LUT_OTA 0x10
 
 #define epdSelect() \
     do {            \
@@ -38,6 +41,8 @@ uint16_t epdGetBattery();
 void epdConfigGPIO(bool setup);
 
 extern bool __xdata epdGPIOActive;
+extern uint8_t __xdata dispLutSize;
+extern uint8_t __xdata customLUT[];
 
 void setWindowX(uint16_t start, uint16_t end);
 void setWindowY(uint16_t start, uint16_t end);
diff --git a/zbs243_shared/board/uc8151.c b/zbs243_shared/board/uc8151.c
old mode 100644
new mode 100755
index 9fe32796..724aa224
--- a/zbs243_shared/board/uc8151.c
+++ b/zbs243_shared/board/uc8151.c
@@ -457,6 +457,7 @@ static void lutGroupRepeatReduce(uint8_t group, uint8_t factor) {
 void selectLUT(uint8_t lut) {
     // implement alternative LUTs here. Currently just reset the watchdog to two minutes,
     // to ensure it doesn't reset during the much longer bootup procedure
+    lut+=1; // make the compiler a happy camper
     wdtSetResetVal(0xFF8E797F);  // 120 s
     wdtOn();
     return;
@@ -476,6 +477,9 @@ void setWindowXY(uint16_t xstart, uint16_t xend, uint16_t ystart, uint16_t yend)
 }
 
 void setColorMode(uint8_t red, uint8_t bw) {
+    // this does exactly nothing, just keeps the compiler from barking
+    red=1;
+    bw=0;
     return;
 }
 void clearScreen() {
diff --git a/zbs243_shared/soc/zbs243/flash.c b/zbs243_shared/soc/zbs243/flash.c
old mode 100644
new mode 100755
index e8c566e2..6bb01ea4
--- a/zbs243_shared/soc/zbs243/flash.c
+++ b/zbs243_shared/soc/zbs243/flash.c
@@ -25,8 +25,6 @@ static uint8_t flashAddrCheck(uint32_t flashAddr, uint16_t len) __reentrant /* t
 			break;
 		
 		case 0x80:
-			if (pgNo)//hmm
-				return 0xff;
 			pgNo = 0x80;
 			break;