Ooooh I feel your pain... Mine is a RB630 and I will be in tears if I lose it.
Found mine a few years ago for a silly price in someones closet, brand new, hadn't been touched for 30 years. Sounds and plays great originally but I've added a hipshot detuner, Babicz bridge (crazy sustain) and most importantly: Lindy Fralin pickups. Silly to put AAA class parts on this guitar cuz I might never get anything back for it but I don't care, it now sounds & plays like a 2000,- Precision for a fraction of the price. Here it is still in original condition when I brought it home: