diff --git a/firmware/integration/rusefi_config.txt b/firmware/integration/rusefi_config.txt
index a95d858fa5..5d083161c2 100644
--- a/firmware/integration/rusefi_config.txt
+++ b/firmware/integration/rusefi_config.txt
@@ -3,6 +3,14 @@
 ! this file is processed by ../java_tools/config_definition.jar tool
 ! comments start with '!'
 !
+! See also ../tunerstudio/readme.txt
+!
+! Q: How to add new fields?
+! A: Find an 'unused' bit or unused int (usually the huge unusedEnd[] array at the end
+!    rename the bit or subsctitute unused intereger with any new fields of the same size
+!    invoke gen_config.bat to apply the tools which would generate .h and .ini files
+!
+!
 ! each field is declared as
 ! type name;comment
 
diff --git a/firmware/tunerstudio/readme.txt b/firmware/tunerstudio/readme.txt
index a5335474b2..66ff9ae81a 100644
--- a/firmware/tunerstudio/readme.txt
+++ b/firmware/tunerstudio/readme.txt
@@ -1,3 +1,3 @@
-rusefi.ini file is generated based on rusefi.input and rusefi_config.txt by ConfigDefinition.jar tool
+rusefi.ini file is generated based on rusefi.input and ../integration/rusefi_config.txt by ConfigDefinition.jar tool
 
 see gen_config.bat
\ No newline at end of file