thanks for your reply.
For my project I didn’t use the classic On-on-on switching version. As I wanted the control under my feet I tried the following:
I hope this is not too confusing… Everything seems to work
first switch is the bypass, second switch acivates both channels at once or routes to the next switch which switches between normal and brite. rat switch activates the rat pcb which sits in front of the sunn-t.
I double checked every signal route. Maybe I should do the audio probe to find some issues.