The editing in Biab is too restricted, that's why I showed the Reaper script that instantly transfers the Biab tracks without rendering to wav and dragging in. You are best to use Biab to just generate up the track/s or section/s and the sooner you get out of Biab into Reaper where you have full editing control that better.
Even when you use the Copy Special function to Move tracks, it turns the track into wav files.
Thank you. I'm relatively new to BIAB but have been recording for about 55 years. Reaper is great and the way you describe is what I've been doing and I agree with you completely. I'm back in familiar territory when I'm in Reaper.
BIAB is a very powerful tool, though, and I'm really surprised with the results I've been getting...surprised in a good way! I've learned a lot on this forum too, from nice folks such as you. Thanks again!