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1 controler for the kemper
and
1 controler for all my midi gears...
or
1 controler for all my midi gears....
with a old boss gt3, i can : change rig, control volume or wah, control my strymon timeline (and his bad looper) and a external disto...
I really doubt that would be necessary.
The rest of your midi gear will have to be in line after the KPA. Using standard 4 pin midi cables.
The axe fx II and their matching midi controller use to use ethercon as well (their controller had the option for midi outs and ins though). I don't think any of their users had any issues controlling other midi gear.