The subzero box has a mode setting that sets the various through settings best leave it on boot default.

If you a want to send keyboard into mu10 use input device record in the DAWand select the KORG.

Switching items on and off or unplugging can confuse things. Probably best to turn on subzero first then turn on other devices.

Don’t forget you can bypass the xg Editor by pressing midi through on FireWire 410

I think the mini midi keyboard is redundant as the korg one can do the business.

The TC Helicon voice processor does not require a midi out and is not part of the main chain