Thank you very much for your answer, late to answer because I wanted to try it first, and the option to add volumes through the expression pedal was better for me ... I did not know that you could do that.
Normally I try to accommodate the guitar patches to have the minimum possible, in this case if I have to do a different one since my idea was to have two amplifiers (clean / Dist) and wha pedal and a microphone with effects.
thank you very much anyway your information was very useful to me