@JimHowell1970

You're right, kinda. I had a Befaco STMix in there, but I removed that, because there is nothing stereo in there. The Planar 2 also functions as a very hands on 4-channel mixer, so looking at the sound sources that should be enough (for me at least).

The midixo is just a dummy, that'll be a 2HP DIYed panel with a TRS jack, as a breakout-module for the Spring Reverb Tank.