I have copious documentation of the 12T2/12T3. Sams, Rider's, and a gazillion photos of the chassis. I'm too sleepy to give a rational response right now, but here's a link to a Picasaweb album, and I'll follow up with specific information as soon as I can.
https://picasaweb.google.com/coldrb/...eat=directlink
-Winky