diff --git a/keyboards/bastardkb/charybdis/3x5/v2/stemcell/config.h b/keyboards/bastardkb/charybdis/3x5/v2/stemcell/config.h
index 6aa20712f67b..50fc030402b2 100644
--- a/keyboards/bastardkb/charybdis/3x5/v2/stemcell/config.h
+++ b/keyboards/bastardkb/charybdis/3x5/v2/stemcell/config.h
@@ -39,15 +39,14 @@
 
 /* SPI config for pmw3360 sensor. */
 #define SPI_DRIVER SPID1
-#define SPI_SCK_PIN B1
+#define SPI_SCK_PIN A5
 #define SPI_SCK_PAL_MODE 5
-#define SPI_MOSI_PIN B2
+#define SPI_MOSI_PIN A7
 #define SPI_MOSI_PAL_MODE 5
-#define SPI_MISO_PIN B3
+#define SPI_MISO_PIN A6
 #define SPI_MISO_PAL_MODE 5
 
 /* PMW3360 settings. */
-#define A1 PAL_LINE(GPIOA, 1)
 #define POINTING_DEVICE_CS_PIN A1
 #define PMW3360_CS_MODE 3
 #define PMW3360_CS_DIVISOR 64
diff --git a/keyboards/bastardkb/charybdis/3x5/v2/stemcell/info.json b/keyboards/bastardkb/charybdis/3x5/v2/stemcell/info.json
index c119df524c31..af74a299be79 100644
--- a/keyboards/bastardkb/charybdis/3x5/v2/stemcell/info.json
+++ b/keyboards/bastardkb/charybdis/3x5/v2/stemcell/info.json
@@ -7,20 +7,19 @@
         "driver": "ws2812"
     },
     "ws2812": {
-        "pin": "D3",
+        "pin": "A2",
         "driver": "pwm"
     },
     "build": {
         "debounce_type": "asym_eager_defer_pk"
     },
     "matrix_pins": {
-        "cols": ["F5", "B6", "D7", "E6", "B4"],
-        "rows": ["F7", "C6", "D4", "B5"]
+        "cols": ["B2", "A4", "B4", "B5", "B8"],
+        "rows": ["B0", "B3", "A15", "B9"]
     },
     "diode_direction": "ROW2COL",
     "split": {
-        "soft_serial_pin": "D2"
+        "soft_serial_pin": "A3"
     },
-    "processor": "STM32F411",
-    "bootloader": "stm32-dfu"
+    "development_board": "stemcell"
 }
diff --git a/keyboards/bastardkb/charybdis/3x5/v2/stemcell/rules.mk b/keyboards/bastardkb/charybdis/3x5/v2/stemcell/rules.mk
index 4436426f3033..4bd570ddd8c3 100644
--- a/keyboards/bastardkb/charybdis/3x5/v2/stemcell/rules.mk
+++ b/keyboards/bastardkb/charybdis/3x5/v2/stemcell/rules.mk
@@ -1,5 +1,3 @@
-CONVERT_TO = stemcell
-
 # Build Options
 #   change yes to no to disable
 #
diff --git a/keyboards/bastardkb/charybdis/3x6/v2/stemcell/config.h b/keyboards/bastardkb/charybdis/3x6/v2/stemcell/config.h
index 6aa20712f67b..50fc030402b2 100644
--- a/keyboards/bastardkb/charybdis/3x6/v2/stemcell/config.h
+++ b/keyboards/bastardkb/charybdis/3x6/v2/stemcell/config.h
@@ -39,15 +39,14 @@
 
 /* SPI config for pmw3360 sensor. */
 #define SPI_DRIVER SPID1
-#define SPI_SCK_PIN B1
+#define SPI_SCK_PIN A5
 #define SPI_SCK_PAL_MODE 5
-#define SPI_MOSI_PIN B2
+#define SPI_MOSI_PIN A7
 #define SPI_MOSI_PAL_MODE 5
-#define SPI_MISO_PIN B3
+#define SPI_MISO_PIN A6
 #define SPI_MISO_PAL_MODE 5
 
 /* PMW3360 settings. */
-#define A1 PAL_LINE(GPIOA, 1)
 #define POINTING_DEVICE_CS_PIN A1
 #define PMW3360_CS_MODE 3
 #define PMW3360_CS_DIVISOR 64
diff --git a/keyboards/bastardkb/charybdis/3x6/v2/stemcell/info.json b/keyboards/bastardkb/charybdis/3x6/v2/stemcell/info.json
index 85b66277cf20..4309fd5ee307 100644
--- a/keyboards/bastardkb/charybdis/3x6/v2/stemcell/info.json
+++ b/keyboards/bastardkb/charybdis/3x6/v2/stemcell/info.json
@@ -7,20 +7,19 @@
         "driver": "ws2812"
     },
     "ws2812": {
-        "pin": "D3",
+        "pin": "A2",
         "driver": "pwm"
     },
     "build": {
         "debounce_type": "asym_eager_defer_pk"
     },
     "matrix_pins": {
-        "cols": ["F6", "F5", "B6", "D7", "E6", "B4"],
-        "rows": ["F7", "C6", "D4", "B5"]
+        "cols": ["B1", "B2", "A4", "B4", "B5", "B8"],
+        "rows": ["B0", "B3", "A15", "B9"]
     },
     "diode_direction": "ROW2COL",
     "split": {
-        "soft_serial_pin": "D2"
+        "soft_serial_pin": "A3"
     },
-    "processor": "STM32F411",
-    "bootloader": "stm32-dfu"
+    "development_board": "stemcell"
 }
diff --git a/keyboards/bastardkb/charybdis/3x6/v2/stemcell/rules.mk b/keyboards/bastardkb/charybdis/3x6/v2/stemcell/rules.mk
index 4436426f3033..4bd570ddd8c3 100644
--- a/keyboards/bastardkb/charybdis/3x6/v2/stemcell/rules.mk
+++ b/keyboards/bastardkb/charybdis/3x6/v2/stemcell/rules.mk
@@ -1,5 +1,3 @@
-CONVERT_TO = stemcell
-
 # Build Options
 #   change yes to no to disable
 #
diff --git a/keyboards/bastardkb/charybdis/4x6/v2/stemcell/config.h b/keyboards/bastardkb/charybdis/4x6/v2/stemcell/config.h
index 6aa20712f67b..50fc030402b2 100644
--- a/keyboards/bastardkb/charybdis/4x6/v2/stemcell/config.h
+++ b/keyboards/bastardkb/charybdis/4x6/v2/stemcell/config.h
@@ -39,15 +39,14 @@
 
 /* SPI config for pmw3360 sensor. */
 #define SPI_DRIVER SPID1
-#define SPI_SCK_PIN B1
+#define SPI_SCK_PIN A5
 #define SPI_SCK_PAL_MODE 5
-#define SPI_MOSI_PIN B2
+#define SPI_MOSI_PIN A7
 #define SPI_MOSI_PAL_MODE 5
-#define SPI_MISO_PIN B3
+#define SPI_MISO_PIN A6
 #define SPI_MISO_PAL_MODE 5
 
 /* PMW3360 settings. */
-#define A1 PAL_LINE(GPIOA, 1)
 #define POINTING_DEVICE_CS_PIN A1
 #define PMW3360_CS_MODE 3
 #define PMW3360_CS_DIVISOR 64
diff --git a/keyboards/bastardkb/charybdis/4x6/v2/stemcell/info.json b/keyboards/bastardkb/charybdis/4x6/v2/stemcell/info.json
index cfae56715f1b..8060c758b88c 100644
--- a/keyboards/bastardkb/charybdis/4x6/v2/stemcell/info.json
+++ b/keyboards/bastardkb/charybdis/4x6/v2/stemcell/info.json
@@ -7,20 +7,19 @@
         "driver": "ws2812"
     },
     "ws2812": {
-        "pin": "D3",
+        "pin": "A2",
         "driver": "pwm"
     },
     "build": {
         "debounce_type": "asym_eager_defer_pk"
     },
     "matrix_pins": {
-        "cols": ["F6", "F5", "B6", "D7", "E6", "B4"],
-        "rows": ["F4", "F7", "C6", "D4", "B5"]
+        "cols": ["B1", "B2", "A4", "B4", "B5", "B8"],
+        "rows": ["B10", "B0", "B3", "A15", "B9"]
     },
     "diode_direction": "ROW2COL",
     "split": {
-        "soft_serial_pin": "D2"
+        "soft_serial_pin": "A3"
     },
-    "processor": "STM32F411",
-    "bootloader": "stm32-dfu"
+    "development_board": "stemcell"
 }
diff --git a/keyboards/bastardkb/charybdis/4x6/v2/stemcell/rules.mk b/keyboards/bastardkb/charybdis/4x6/v2/stemcell/rules.mk
index 4436426f3033..4bd570ddd8c3 100644
--- a/keyboards/bastardkb/charybdis/4x6/v2/stemcell/rules.mk
+++ b/keyboards/bastardkb/charybdis/4x6/v2/stemcell/rules.mk
@@ -1,5 +1,3 @@
-CONVERT_TO = stemcell
-
 # Build Options
 #   change yes to no to disable
 #
diff --git a/keyboards/bastardkb/scylla/v2/stemcell/info.json b/keyboards/bastardkb/scylla/v2/stemcell/info.json
index d463418cf19c..598ca9d9ee07 100644
--- a/keyboards/bastardkb/scylla/v2/stemcell/info.json
+++ b/keyboards/bastardkb/scylla/v2/stemcell/info.json
@@ -7,20 +7,19 @@
         "driver": "ws2812"
     },
     "ws2812": {
-        "pin": "D3",
+        "pin": "A2",
         "driver": "pwm"
     },
     "build": {
         "debounce_type": "asym_eager_defer_pk"
     },
     "matrix_pins": {
-        "cols": ["F6", "F5", "B6", "D7", "E6", "B4"],
-        "rows": ["F4", "F7", "C6", "D4", "B5"]
+        "cols": ["B1", "B2", "A4", "B4", "B5", "B8"],
+        "rows": ["B10", "B0", "B3", "A15", "B9"]
     },
     "diode_direction": "ROW2COL",
     "split": {
-        "soft_serial_pin": "D2"
+        "soft_serial_pin": "A3"
     },
-    "processor": "STM32F411",
-    "bootloader": "stm32-dfu"
+    "development_board": "stemcell"
 }
diff --git a/keyboards/bastardkb/scylla/v2/stemcell/rules.mk b/keyboards/bastardkb/scylla/v2/stemcell/rules.mk
index 8dda103d07a7..8256842e21d0 100644
--- a/keyboards/bastardkb/scylla/v2/stemcell/rules.mk
+++ b/keyboards/bastardkb/scylla/v2/stemcell/rules.mk
@@ -1,5 +1,3 @@
-CONVERT_TO = stemcell
-
 # Build Options
 #   change yes to no to disable
 #
diff --git a/keyboards/bastardkb/skeletyl/v2/stemcell/info.json b/keyboards/bastardkb/skeletyl/v2/stemcell/info.json
index b44d64a47aae..b384da9dbdc0 100644
--- a/keyboards/bastardkb/skeletyl/v2/stemcell/info.json
+++ b/keyboards/bastardkb/skeletyl/v2/stemcell/info.json
@@ -7,20 +7,19 @@
         "driver": "ws2812"
     },
     "ws2812": {
-        "pin": "D3",
+        "pin": "A2",
         "driver": "pwm"
     },
     "build": {
         "debounce_type": "asym_eager_defer_pk"
     },
     "matrix_pins": {
-        "cols": ["F5", "B6", "D7", "E6", "B4"],
-        "rows": ["F7", "C6", "D4", "B5"]
+        "cols": ["B2", "A4", "B4", "B5", "B8"],
+        "rows": ["B0", "B3", "A15", "B9"]
     },
     "diode_direction": "ROW2COL",
     "split": {
-        "soft_serial_pin": "D2"
+        "soft_serial_pin": "A3"
     },
-    "processor": "STM32F411",
-    "bootloader": "stm32-dfu"
+    "development_board": "stemcell"
 }
diff --git a/keyboards/bastardkb/skeletyl/v2/stemcell/rules.mk b/keyboards/bastardkb/skeletyl/v2/stemcell/rules.mk
index 8dda103d07a7..8256842e21d0 100644
--- a/keyboards/bastardkb/skeletyl/v2/stemcell/rules.mk
+++ b/keyboards/bastardkb/skeletyl/v2/stemcell/rules.mk
@@ -1,5 +1,3 @@
-CONVERT_TO = stemcell
-
 # Build Options
 #   change yes to no to disable
 #
diff --git a/keyboards/bastardkb/tbkmini/v2/stemcell/info.json b/keyboards/bastardkb/tbkmini/v2/stemcell/info.json
index a75db584e798..f62427438b70 100644
--- a/keyboards/bastardkb/tbkmini/v2/stemcell/info.json
+++ b/keyboards/bastardkb/tbkmini/v2/stemcell/info.json
@@ -7,20 +7,19 @@
         "driver": "ws2812"
     },
     "ws2812": {
-        "pin": "D3",
+        "pin": "A2",
         "driver": "pwm"
     },
     "build": {
         "debounce_type": "asym_eager_defer_pk"
     },
     "matrix_pins": {
-        "cols": ["F6", "F5", "B6", "D7", "E6", "B4"],
-        "rows": ["F7", "C6", "D4", "B5"]
+        "cols": ["B1", "B2", "A4", "B4", "B5", "B8"],
+        "rows": ["B0", "B3", "A15", "B9"]
     },
     "diode_direction": "ROW2COL",
     "split": {
-        "soft_serial_pin": "D2"
+        "soft_serial_pin": "A3"
     },
-    "processor": "STM32F411",
-    "bootloader": "stm32-dfu"
+    "development_board": "stemcell"
 }
diff --git a/keyboards/bastardkb/tbkmini/v2/stemcell/rules.mk b/keyboards/bastardkb/tbkmini/v2/stemcell/rules.mk
index 8dda103d07a7..8256842e21d0 100644
--- a/keyboards/bastardkb/tbkmini/v2/stemcell/rules.mk
+++ b/keyboards/bastardkb/tbkmini/v2/stemcell/rules.mk
@@ -1,5 +1,3 @@
-CONVERT_TO = stemcell
-
 # Build Options
 #   change yes to no to disable
 #