So I rebuilt my guitar rack to be a hybrid bass and guitar rack.
(ADA MP2, Quadverb, ADA MB1, Midiverb 4, Carvin DCM200L, 2 x MESA P112 cabs)
So simple set up:
MP2 (cab sim outs) > Desk (ch 2&3) > DCM200 > 2 x P112 cabs
MB1 > Desk (ch4)
Desk Aux 1 & 2 > Quadverb > Desk (ch 7 (stereo channel))
Desk Aux 3 > Midiverb 4 (L mono, also copied to R ch) > Desk (ch8 (stereo channel).
I played some bass through it to test, sounds great

, I'll do guitar later, then try to mic up and make some audio.