As the subject suggests, I would like to use an expression pedal to drive sweeps for 2 pedals. Ideally I would like it to be always open so the expression pedal will work with either pedal without having to click the expression pedal on. I was thinking of getting a tiny A/B/Y pedal that offers the A+B connection. This would work as long as I use TRS cabling, right? Any suggestions on the smallest box?