There isn’t a way to tap the signal between Stomp D and the Stack. There are multiple DI options before the stomps and multiple output choices after the stack but not where you want.
It might be possible to use the loop mono in Stomp D but the lack of a return would break the signal path so might need an A/B/Y box. I haven’t tested it.
Thanks for the input. I think I managed to solve the lack of return by setting the loop mono mix to 50%
I've tested and the effects before the loop can be heard in both the main output and send 2 output
I wonder if there's any catch to this?