DionR said

Correct, my model is currently laid out around the S550 hub and SP rotor/caliper.

Yes, there is a potential benefit to the S197 rotor and caliper. Upgrades to a 15" package are easy, they seem to have worked well in their application, prices aren't bad, they are probably a touch lighter than the SP setup and they should (in theory) fit the hug with no slope (the center bore on the SP rotor is bigger than the pilot on the hub).

The rotor info is easy, don't need those to measure from. It's just the centerline of the rotor to the mounting surface of the caliper that I need.

I would hate for you to spend money to send me a caliper. I hadn't thought about it until now, but I could buy one and return it after getting the measurements. There aren't any that I find locally, but I can order one from Autozone with free shipping and return it to the store so no one is out money.



I could setup a model that uses a machined spacer instead of the sheetmetal one. It would probably be a different shape than the one I have right now so it would be a different design.

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