Eric's Guitars in the Northridge area is very good. I would not hesitate to recommend him a bit: good guy, honest, solid work. But my first go-to is always Norik Renson of Renson Guitars in Studio City. This guy reads like a who's-who tech of all as he has worked on serious players' guitars. But that's just his skills. What makes him my first go-to guy is he's a humble, quiet guy who simply knows what to do, does it for you, and treats you like one of his rock-star clients ...I'm a simple hack and I always get his undivided attention and customer care. I cannot say this of every shop I've been in, (and will NOT say this of one certain high-notoriety shop in Santa Monica whose name is one of the biggest, and I can say nothing good about him). Oh, and of course, both Eric and Norik are authorized Taylor techs so will do warranty work w/o a blink.
Edward