So, just scored an artcore at a good price, and it's fixed bridge. I've never owned one before, so if anyone has any experience, please chime in as I am looking at how feasable / difficult modifying them is seeing as they are hollow body, and there's no cavity plates so I am assuming access to everything is quite fiddly and hard...
- Pickup swap
- Installing a bigsby trem
Especially the second item, as I think a bigsby trem would really make the guitar look cool!
All your wiring is fiddled in. They wire it up then slip it through the F-holes and mount it from there. Its a fiddly job, full of swearing and crying, although well worth it, the Artcore Pickups are nothing to write home about.
As for a bigsby, it depends on what model you have. If you have one with a trapeze tailpiece then you will have a rosewood-based TOM bridge, which is called the ART-2 bridge. You can swap the whole arrangement for the Ibanez bigsby type job and the ART-1 roller bridge for minimal cost (all the bits line up roughly too) but you'll have to lie and name your model as being one that normally comes with those bits.
If you have one of the slimline Artcores more similar to a Gibsoon 335 then you'll have pressmounted studs punched through a solid wood toneblock running the centre of the body. At that point you're looking at a more traditional (read expensive) Bigsby installation on an instrument not designed to have one.