Right now I have the FA sending program changes and controlling sounds on my Electro, but I have the patches lined up 1:1. The downside is if I have 15 patches with a piano or organ sounds, I use 15 patches in the Electro to duplicate what should be 2 patches. I'll be interested to see how it works with my full stack for the Floyd band. Right now I don't do any program changes from the FA for that, while the boards are midi'd together for control/layer purposes, I change each patch manually. I put it all in order for the show and scroll thru on each board.