I actually didn't plan to fill the third row, yet, and thought about a drum rack if I would.

However, I'm more inclined to keep the Rytm on foundational drum duty and let the rack focus on grooves and other voices.

More than anything else, moving voices and sounds around freely and uniquely with modulation is what makes modular sound special relative to regular complete synths and grooveboxes.
-- Zacksname

Well said. This is exactly what Im discovering lately. There are so many ways to modulate and I've probably just scratched to surface.

Will try to use freerunning LFOs from my DAW (controlled via MIDI controllers) for now. This will save HP and money so I can focus on live performance oriented utilties. Not sure how that's going to fit in 6U though :)

Thank you for your insights!