Hi Charlie.
"possibly combine the two projects into a more complex single arrangement"
That the goal smile

There are several ways that I can do this. The easiest one which will resolve this once and for all (and would solve other issues requests) still remains a "wish" - more available tracks in mixer.

All others are "workarounds". The easiest one for me is to create two separate projects with same amount of bars + parts and work on them, trying out different RT's, keeping them "liquid" (modifiable) until I am ready to export stems. Then render project A + project B --> import to DAW.

RB is not something I would use.

P.S. Charlie, I wanted to respond to you on the other thread about getting from point A to point B through shortest route, but it was not my topic, I did not want to steer it from original request by OP. So re-flashing the thought. In my opinion, it is quite opposite. The more automated non-creative, tedious processes are, the more time you have to get creative and less unnecessary items to keep in memory.

So, even Pipeline's suggestion of importing the chords through SGU is a step in unwanted direction. Sure, it is easy enough, but why? If the bugs are fixed in copying the chord sheet from project to project or even from instance of BIAB to another instance, life would be a few seconds longer for other things. (Pipeline, please do not hold against me, your suggestion is actually the one that 100% works)
But ultimately, my #1 BIAB request is to have more available tracks in the mixer. That should solve ~90% frustrations in my workflow.

that was a long reply smile

Misha.