Hi Zandit, Doc's comments are mostly relevant if you intend to use the tremolo. If you don't just screw the spring tensioner up really tight and that will help hold it in tune and slightly improve the sustain.
Like most things, with an unlimited budget you can go nuts doing lots of upgrades but best to get used to how it plays and operates to identify what, if anything at all, needs attention the most and therefore becomes the highest priority.
Edit: Just listened to the sound demo with headphones on and it is sweet as and reckon your description for 3 way mini switching was spot on as the series position should have a more fuller sound, like a humbucker, which it did and in parallel it sound a bit thinner, which it also did.
If the Bridge PUP sound level is too high maybe you could lower the PUP down into the body a fraction until sound level is where you want it.
Really happy for you with how this restoration turned out. Well done buddy.
