Wow, guys, thanks for all the links! Great to see that I don't have to re-invent the wheel on this build. I have a few more modifications to the body cavity (a lot of this routing was already done - I lucked into a great eBay find...) and I've figured out the wiring challenges. I have some finishing parts on order from Stew Mac so that I can get on with the heel mod.
Very cool work on the "pro-attach" thingy and the thin heel routing in those threads. I am now re-thinking the heel plate. If I recess it, it might prove a better option than countersunk ferrules. And maybe I can have that dude on here who customizes them make me a cool pattern. I love the interaction on this board - lots of unique ideas floating around out there!
I'm going to put a pearloid cover on the traditional jack plate and put a tele-style jack next to the MIDI jack. Then, I can put two knobs and two switches in the spot where the top 1/4" jack goes and it shouldn't look too obnoxious. Then, I'll have Acoustic and MIDI volume as well as mag/piezo/midi switching options.
I bought a second-hand GR-33 to play with - got a great deal on eBay (I love that theme) and I figured it was as good a place to start as any in the world of guitary synth.
I think I need a looper now (or maybe a looper/delay combo) and then I'll have enough to keep me occupied for years.