Hi guys! I finally solved my C4 MIDI issues. It was simple once I got a clear idea. I programmed on switch one of the Ampero Control a recall for the first preset of the C4, so I can always go back to square 1! (Mode: SIngle, channel 1, CC 104, Data 0). On the second one the increase preset (Mode: SIngle, channel 1, CC 106, Data 0). On the third the decrease preset (Mode: SIngle, channel 1, CC 107, Data 0). And on the 4th switch a tap tempo (Mode: SIngle, channel 1, CC 93, Data 0). I'm also using the Source Audio Dual Expression Pedal, straight to the C4 via the Control Input jack. As simple as that. I hope anyone can use this info. Enjoy!