Re: U.S.A Custom necks
I grew up with Warmoth. I lived and worked close to them and have done business with them since they started. Great company and I loved their necks. In addition, I've used many different strat/tele/whatever necks on various parts builds over the years. From Fender to Squier to various el-cheapo's to various aftermarket companies. I've had some Squier necks that were pretty darn amazing and a few Johnson necks that were quite good for $15 - $20. However, for my tastes, USACG are simply the best necks I've used and their fret work is top notch.
Especially (as you are doing) if you spec things out to your preference. My favorite USACG neck is on my 14 year old (also USACG) chambered mahogany tele. I asked for a rosewood fingerboard with a 12" radius, soft V profie (after my 70's Tokai strat) and 6105 frets.
From the moment I strung the guitar up for the first time, it was so close to perfect I could have left it as is. As sirloin said, I've yet to touch the truss rod! The whole guitar is a very special instrument and the neck is a huge part of it. I love the way it feels and it inspires me to play. I love guitars and can't pass up a good buy, yet this tele is the one I want to play. It's sent some very fine guitars packing in the years I've had it.
There are some great people out there making fine products. USACG is one of them and my favorite.