[quote name='AinsleyWalker' timestamp='1449743005' post='2926367']
Others have said this to me but a lot of guides give very varied advice. I'd assume all you need to adjust the neck and bridge would be an allen key and a screwdriver but most guides I've looked at say you need a load of tools..
I've also been warned that doing it wrong and messing up the truss rod can cost £££ to fix... Any truth to this?
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I can only speak for myself. I learned how to do it myself, and I'm pretty sure I read it in a book, not got it from any youtube video. Loads of tools? Well sure if you want to set up many different basses but you have a Stingray, so you're right - you can do it with an allen key and an appropriately sized phillips/pozidriv screwdriver. You should double check (some Stingray expert please chip in here) but what I've read is the saddle height grub screws need a 1/16" allen key. The screwdriver is for adjusting the intonation (moving the bridge saddles back/forward). The truss rod on a Stingray has a wheel with holes in it that you can stick anything in (like the allen key or a suitably sized screwdriver) and turn it with that. So for your bass, 2-3 tools tops. A pair of snips for trimming excess string when restringing is useful if you're restringing as well.
Regarding the truss rod - "messing up" is a pretty loose term. If you get it "wrong" (as in set incorrectly) then you will have too much or too little relief in the neck, causing buzzing. So set it correctly. Won't cost you a bean unless you actually break the truss rod and you really have to go some to do that and yes, it would be very expensive - like "might be cheaper to replace the neck entirely" expensive. I've never broken one. If it's giving you resistance, don't keep forcing it. Loosen a little first before tightening. Sometimes if they haven't moved in a while they will be sticky and move suddenly with a potentially alarming snap sound, but don't worry.