By far the easiest way to do what I was trying is to select one of the standard medley styles and change the tracks via the Medley button in the RealTracks picker. That starts out with a working medley and I just configure what I wand where. So far that appears pretty painless and very effective.

Jazz relative beginner, starting at a much older age than was helpful.
AVL:MXE Linux; Windows 11
BIAB2025 Audiophile, a bunch of other software.
Kawai MP6, Ui24R, Focusrite Saffire Pro40 and Scarletts
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