So I guess I'll need to create duplicate tracks for cloned RealTracks after all.
Easiest way!
Yeah, for my purposes I do believe so.
That other thing kind of scares me, anyway. Too "internal" to BIAB. I mean, after I "thicken" a track into 5 guitars, where ARE they all? I guess the answer is, they aren't anywhere, you just have a 5-guitar "ThickTrack" with very limited internal controls (vol/pan).