Well, I've decided to stop messing about worrying about modifying the body shape and just get the damn thing assembled. I've got 2 weeks off coming up and a set of double ball end strings just arrived in the post. There are three (relatively) simple steps:
1. Get the neck properly attached (will use a neck plate for now, but will be using recessed bushings eventually)
2. Get the bridge units attached (checking that the positioning is feasible for both intonation adjustment range and attaching double ball end strings)
3. Rewire electronics
After that I'll be able to assess the playability and make proper decisions about any body modifications (lower cutaway edge bevelling, scalloped out end for easier access to the tuners, possibly moving the strap button from the upper bout to the neck heel somewhere).
I'm looking forward to having a go on it soon