Just jumping in with a quick comment (don't have the time atm to do a full rundown) but I wanted to make sure you knew that the Minibrute 2s actually has three completely independent sequencer channel outs. The first has two outs (pitch + gate), while the other two each have a single out (either pitch OR gate OR generic voltage). With that in mind, I'm not sure you need the metropolis unless there's a fourth gate/pitch you need that you can't generate or derive from elsewhere.