I'm using Fender custom shop necks and tried a MIJ body and recently a new Allparts body (also made in Japan I think), and I could stick a heavy pick on one side while a buisness card on the bass side. They were extremely sloppy fitting with two Fender CS necks. Too much play and required, really wiggling the neck around to get proper alignment. I didn't like that and in my mind, it could shift on me at times. I like it to seat properly.
I could see MIJ being metric or a little off, but an Allparts is supposed to be part of a build and should accomodate a lot of makes. So wouldn't they make it a little snug? Much easier to sand than add wood.
Anyhow, should I stick with US made bodies? I don't want to fork out the $ for a CS body. What about a highway body or an EJ. Do you guys think I'd get a better fit? It doesn't have to be ultra perfect, but I don't want gaps on both sides of the neck!