you could of course convert the midi tracks to audio in RB - would that work Jim? but then you lose the chance to edit midi when you get back into BIAB so you'd have to complete your midi editing first in RB.

but if you want to add extra RTs and midi once you are back in BIAB and the midi is edited the way you want in RB before you convert to audio that might help.

but it is an inelegant solution