Depending on your situation, you could use the PDL aux switch function for this – say you have one patch you want to oscillate, then you set the PDL function like you set for an expression pedal and have feedback at 110, so that as long as you hold down the button, Fdbk goes to 110. Say on another patch you want Fdbk to go to 100, then you set the PDL function to 100. Is that the sort of thing you wanted/meant?
