I had some annoying issues at a gig last night with my HX Stomp XL. First of all, the graphics are so small, it's almost impossible to see. I also kept switching on and off the wrong snapshots and effects because of how close the buttons are. And last but not least, I have the Mission SP1-L6 pedal, set up to control wah. I had it working at home to switch on and off via the switch, and position set to expression 1. Somehow, at some point in the gig, the position stopped working. Meaning, the wah would engage with the toe switch, but rocking the pedal wouldn't sweep the wah through its range. And I couldn't figure out how to fix it on the fly. Very frustrating!