There's some frac rack, but mostly it's not really in a format. It uses small jacks like eurorack, but +/-15 volts like 5U and 4U. The panel size is unique, because that's the size of the aluminium panels from my local hardware store.
Sounds awesome! Do you write originals, or do you cover literal classical music, or do you do something in between? I've messed a bit with the areas in between and just straight transcribing pieces in Csound.