Next I installed the bridge cups (I had to slightly enlarge the holes) and then I screwed down the tremolo. (Oh I also drilled a bridge ground hole and put a ground wire in.)

DSC06211 by Hentai No Baka, on Flickr

DSC06213 by Hentai No Baka, on Flickr
Then I installed the Musicmaster neck. Fit great.

DSC06214 by Hentai No Baka, on Flickr
Here it is with a Mustang pickguard on it. (Not using it, just to get a better idea of how it looks.)

DSC06216 by Hentai No Baka, on Flickr
Here you can see where the Mustang guard's curve isn't deep enough for the body.

DSC06217 by Hentai No Baka, on Flickr
I need to get my custom guard made and I also need a Mustang control plate. I think I need a input jack and a blending pot as well. Progress!