Thanks for the advice, guys. I've installed a string ground but haven't soldered it yet, just left it out of the way. I don't think I'll need it though.
It's all wired up and working. A couple of things I learnt:
- use at least a 40W soldering iron. I borrowed a 20W because my old one had packed it in, and it had a hard time heating up the pot housings. Got there in the end but the extra wattage would have helped a fair bit.
- Make sure none of the pot terminals are touching the shielding. The "hot" terminal of the bridge vol pot was touching the wall of the cavity, which caused it to a) not work, and b) stuff around with the neck pup when the selector switch was in the middle position. All sorted now.
Apart from that, I seem to have nailed it first go. No hum or buzz, and the pups and selector switch are working the way they should.
I'm going to get some different knobs, though. Because it's a lefty, the controls are back to front. Which means I get no noise when the dial says 10, and maximum shreddage when the dial says 0. I'll probably go for some without numbers or somesuch.