diff --git a/Makefile b/Makefile
index e43b162..4c10b5c 100644
--- a/Makefile
+++ b/Makefile
@@ -65,7 +65,7 @@ TOOLCHAIN=GCC_ARM
 #
 # If CONFIG is manually edited, ensure to update or regenerate launch configurations
 # for your IDE.
-CONFIG=Costum
+CONFIG=Custom
 
 # If set to "true" or "1", display full command-lines when building.
 VERBOSE=
diff --git a/README.md b/README.md
index bffa94a..deae4d4 100644
--- a/README.md
+++ b/README.md
@@ -4,13 +4,15 @@ Rutronik Development Kit Programmable System-on-Chip CY8C6245AZI-S3D72 "Arduino
 
 This example demonstrates how to use PDL library to measure all the ADC channels on the Arduino ADC header. 
 
- <img src="images/rutdevkit_model.png" style="zoom:20%;" />
+ <img src="images/rdk2_rev1.jpg" style="zoom:80%;" />
 
 ## Requirements
 
-- [ModusToolbox® software](https://www.infineon.com/cms/en/design-support/tools/sdk/modustoolbox-software/) v3.0
+- [ModusToolbox® software](https://www.infineon.com/cms/en/design-support/tools/sdk/modustoolbox-software/) **v3.x** [built with **v3.0**]
 
+## Supported toolchains (make variable 'TOOLCHAIN')
 
+- GNU Arm&reg; Embedded Compiler v11.3.1 (`GCC_ARM`) - Default value of `TOOLCHAIN`
 
 ## Using the code example
 
diff --git a/images/rdk2_rev1.jpg b/images/rdk2_rev1.jpg
new file mode 100644
index 0000000..340ce5e
Binary files /dev/null and b/images/rdk2_rev1.jpg differ
diff --git a/images/rutdevkit_model.png b/images/rutdevkit_model.png
deleted file mode 100644
index 0a6e073..0000000
Binary files a/images/rutdevkit_model.png and /dev/null differ