brad,
I think the developer... (bremtek) was George Maybe out here in colorado. He is a club racer locally and used to be much more involved. He has a day job though and I think he just ran out of time to play with the brakes.
I could hook you up with an email address if you want.
He just hosted a wine and cheese car show event at his house yesterday, I'll forward a link to pictures. He has a damn... impressive shop area for a hobby guy.
He built it to copy the original factory building. The last page of pictures shows a speedster he rescued from a man made reservoir. I think it was sunk for 20+ years... a little rusty.
http://whirledmedia.com/gmund/gmund.htmlThere is a car locally with these 4 bolt hubs on it. I see the new owner regularly at track events. He has no idea what he has got... I could maybe hook you up with him in the off season if he was willing to pull a hub, but you'd probably be better off talking to george directly for the measurements.
George also build a "time machine" self timing device. Kinda like a hot lap only 5-10 years earlier. It sent its own signal all from one unit, but relied upon the signal to reflect back. He was a pretty inventive guy.
brant