Well I figured it out. The screw holes in the neck from my Vintage Modified Tele were not as deep (apparently) as what an Affinity Tele has. Also, I think the screws from the Affinity Tele were a bit bigger in diameter. This made it very difficult to screw the neck down tight enough to seat properly in the neck pocket. I drilled them out (carefully, with shaking hands and sweat on my brow) and voila... all good. Needs a bit of a set up, but other than that sounds and plays pretty good. I don't think I'll sell it. I'm going to keep it as a backup and for my kids to bang around on. That was a fun project... can't wait to see what's next