In the meantime, I decided to check bodies and necks for accuracy by drawing centre lines and checking alignment:
1) Neck pocket wall and end of neck heel didn't fit and the pocket was 1mm too wide. Reviews warned me of this so it wasn't a total surprise. I bought a black three ply HSH pickguard and checked the pocket on that against the body. It aligns surprisingly well although still too wide (58mm, rather than 56) but the fit issue must be the neck heel. Sure enough, the curve is asymmetrical.
2) The floor of the neck pocket is uneven. There's no excuse for this really, it's just sloppy paths in the milling software.
3) I did a quick check of neck alignment as best I could using cotton thread. The alignment might be out by 2-3mm but it needs checking with straight edges to be sure.
4) The trem cavity was unfinished along one long side and a trial fit of the bridge suggested it might need widening for full function. I bought a router bit specifically designed for under cutting the top rout by about 3mm.
So with the bridge, neck, HSS pickguard for one of the bodies I did a trial fit just to give me a sense of what to expect.