I found out today that the TT rotors are 330mm x 34mm. Apparently the others are 350mm x 34mm. I talked to a couple of people today that suggested you could make a 10mm spacer to go under the caliper to make the stock calipers line up with the other rotors, including TRG. I had Austin at TRG check a TT rotor against a Cup Car rotor to verify the offset was the same. So, I think I am going to make a 10mm spacer, get some 10mm longer socket cap bolts (M12 I think) and try a Porsche Motorsport Cup Car rotor and the spacers. The only caveat is that the TT pads are slightly shorter that the Cup Car pads so it won't use the entire swept surface height of the rotor, there may be a millimeter or two at the top and bottom that goes unused but I should get more leverage and since it's a Cup Car rotor it should be a better rotor with better cooling. The rotors are $297 from TRG and I can make the spacers and get the bolts. It will be 1/4 the cost of a set of 6-pistons. I think it's worth a try.