I thought about that...
The backing plates were .125" thick plus add for the gaskets.
I could use the old retaining plates (.125") as a spacer.
This would make the wheels space out further though.
The rotor hat will also move the wheel out an additional .25" per side and I don't want to rub the inner fender lip??
Nothing is easy!! Guess going faster and stopping faster is never that easy
Ed