Since the initial post (from many moons ago), I've learned all of this and more. I met up with John Thurston a few months back. He is still around and and in the industry and runs a small guitar repair shop in Catonsville. I've had him do some work for me. His work is top notch! I've since seen a couple more of KT basses come thru GC. One I really like but they wanted over $1000 for it and I just didn't have that kind of cash at the moment.
Oh, for a funny story, turns out I visted the old shop in the Mill as a young teen (13 or so) in the early 80's. I had just gotten into playing guitar (not bas yet) and a few of us were riding bicycles thru Dickysville (I grew up near there outside of Woodlawn) and stumbled upon the shop. One of the guys was real nice and gave us a tour even though he knew we didn't have 2 cents to our name. Ironic that all of this other stuff came abgout years later huh?