Last night I started from scratch. An empty ST3.
I imported 20 or so tracks, (each one duplicated, as I want two versions of each song),into the app.
Gave each one a colour, suffix, and keyword…..
red…S….SOLO, for solo version….
Blue…. B…BAND, for band version …
Shared the pdfs from another app on both versions of each song.
Now all I need to do is enter midi information where necessary.
It will obviously take a while as there are hundreds of songs.
Jobs a goodun.