IN RE MIDI CONTROLLERS:
I use a Disaster Area DMC-3XL. But there are tons. It is 4.8″ x 2.6″ x 1.4″
You could control 3 H9s with this if you wanted. but in banks for each pedal.. or you can call PC messages on all of them simultaneously for coordinated switches.
Have you tried using the Disaster Area DMC for switching through presets? Does it lag the way the TRS switch does?