Since I haven’t had any replies, I thought I’d update this with the response I got back from Mission Engineering support. They haven’t tested this themselves, but they think the SP1-L6H, which is their expression pedal for the Line 6 Helix, will work as I’m wanting it to. It’s got a mono out for the expression jack and a momentary switch, so it should meet Eventide’s recommended specs. I’m going to order one and try it out.
