diff --git a/.gitignore b/.gitignore
index 34f1d9d..fbf203f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 *.bin
 *.hex
+*.uf2
diff --git a/README.md b/README.md
index 0275e7f..b7422fb 100644
--- a/README.md
+++ b/README.md
@@ -34,24 +34,32 @@ You need to have a locally setup QMK and use this repo as overlay:
 qmk config user.overlay_dir="/data/home/cullmann/data/qmk/christoph-cullmann"
 ```
 
-To use my keymaps, do for the Corne
+To use my keymaps, one can do:
+
+Aurora Sweep
+
+```zsh
+qmk flash -kb splitkb/aurora/sweep/rev1 -km christoph-cullmann
+```
+
+Ferris Sweep
+
+```zsh
+qmk flash -kb ferris/sweep -km christoph-cullmann
+```
+
+Corne
 
 ```zsh
 qmk flash -kb crkbd/rev1 -km christoph-cullmann
 ```
 
-or for the Planck
+Planck
 
 ```zsh
 qmk flash -kb planck/rev6_drop -km christoph-cullmann
 ```
 
-or for the Ferris
-
-```zsh
-qmk flash -kb ferris/sweep -km christoph-cullmann
-```
-
 # Foundation
 
 Based on ideas and code from:
diff --git a/common/keymap.h b/common/keymap.h
index 42e5380..2af3c81 100644
--- a/common/keymap.h
+++ b/common/keymap.h
@@ -107,7 +107,7 @@ bool get_chordal_hold(uint16_t tap_hold_keycode, keyrecord_t* tap_hold_record,
     return get_chordal_hold_default(tap_hold_record, other_record);
 }
 
-#ifndef NO_LED
+#ifndef CC_NO_LED
 
 void keyboard_post_init_user(void) {
     // always use the same effect
diff --git a/keyboards/ferris/keymaps/christoph-cullmann/keymap.c b/keyboards/ferris/keymaps/christoph-cullmann/keymap.c
index daa693b..f4e9197 100644
--- a/keyboards/ferris/keymaps/christoph-cullmann/keymap.c
+++ b/keyboards/ferris/keymaps/christoph-cullmann/keymap.c
@@ -21,7 +21,7 @@ K20,   K21,   K22,   K23,   K24,                 K25,   K26,   K27,   K28,   K29
 )
 
 // no led
-#define NO_LED
+#define CC_NO_LED
 
 // our shared 42 keys keymap
 #include "common/keymap.h"
diff --git a/keyboards/splitkb/aurora/sweep/keymaps/christoph-cullmann/config.h b/keyboards/splitkb/aurora/sweep/keymaps/christoph-cullmann/config.h
new file mode 100644
index 0000000..ae8e70b
--- /dev/null
+++ b/keyboards/splitkb/aurora/sweep/keymaps/christoph-cullmann/config.h
@@ -0,0 +1,9 @@
+/**
+ * SPDX-FileCopyrightText: 2024 Christoph Cullmann <christoph@cullmann.io>
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#pragma once
+
+// our shared config parts
+#include "common/config.h"
diff --git a/keyboards/splitkb/aurora/sweep/keymaps/christoph-cullmann/keymap.c b/keyboards/splitkb/aurora/sweep/keymaps/christoph-cullmann/keymap.c
new file mode 100644
index 0000000..f4e9197
--- /dev/null
+++ b/keyboards/splitkb/aurora/sweep/keymaps/christoph-cullmann/keymap.c
@@ -0,0 +1,27 @@
+/**
+ * SPDX-FileCopyrightText: 2024 Christoph Cullmann <christoph@cullmann.io>
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include QMK_KEYBOARD_H
+
+// layout helper macro, we just use 42 keys
+#undef LAYOUT
+#define LAYOUT(\
+K00,   K01,   K02,   K03,   K04,                 K05,   K06,   K07,   K08,   K09,\
+K10,   K11,   K12,   K13,   K14,                 K15,   K16,   K17,   K18,   K19,\
+K20,   K21,   K22,   K23,   K24,                 K25,   K26,   K27,   K28,   K29,\
+                     K30,   K31,                 K32,   K33\
+)\
+LAYOUT_split_3x5_2(\
+K00,   K01,   K02,   K03,   K04,                 K05,   K06,   K07,   K08,   K09,\
+K10,   K11,   K12,   K13,   K14,                 K15,   K16,   K17,   K18,   K19,\
+K20,   K21,   K22,   K23,   K24,                 K25,   K26,   K27,   K28,   K29,\
+                     K30,   K31,                 K32,   K33\
+)
+
+// no led
+#define CC_NO_LED
+
+// our shared 42 keys keymap
+#include "common/keymap.h"
diff --git a/keyboards/splitkb/aurora/sweep/keymaps/christoph-cullmann/rules.mk b/keyboards/splitkb/aurora/sweep/keymaps/christoph-cullmann/rules.mk
new file mode 100644
index 0000000..6b2cdc1
--- /dev/null
+++ b/keyboards/splitkb/aurora/sweep/keymaps/christoph-cullmann/rules.mk
@@ -0,0 +1,6 @@
+# include common settings
+ROOT_DIR := $(dir $(realpath $(lastword $(MAKEFILE_LIST))))
+include ${ROOT_DIR}../../../../../../rules.mk
+
+# we use an Liatris cpu
+CONVERT_TO=liatris