Randall, I like those Jim Olsen fixtures, but for a one-off guitar, I think that is way out of my league.
John, I think I could work with the plug idea. Since my goal is to glue up the neck material long enough that it extends all the way to the bottom end of the guitar, I could create an mdf jig, create plugs for the pickups, and another plug at the top end of the truss rod groove, and that should get me pretty close.
Thanks for the help - now I just need to figure out when I can get started.
Also, I have a lot of walnut wood for the main body, but haven't dug through my wood piles enought to see if I have anything for the neck piece. I do have a huge piece of wood with a tight grain that is quarter sawn, but I'm working with someone that may be able to identify a lot of the wood I have. Can anyone point me toward a resource for the neck material? I wish I could find someone that might want to swap the neck wood for a piece of walnut.