Using mustang rotors for 4.5" bc

IMG_20200401_123357.jpg IMG_20200401_122412.jpg IMG_20200401_145449.jpg I'd like see if there's an interest in creating the definitive guide to using the mustang rotors as a swap for the KH rotors.
My lathe is a little too small to swing the 11.210" mustang rotors so I set it up in my mill on a rotary table.. I'll do the machining of the bearing/seal areas but will have to bring them to get the OD cut down. I'm including a photo or two of the measurements I've taken and the demensions I think are correct. My main question is the difference in the distance from the outside dust cup face and the inside of the rotor face. There is a difference of -.125" between the mustang rotor and the OEM rotor. What, if anything, should folks be concerned about?
Thanks
Fwiw, this is a rotor I machined to the specs above minus the OD reduction.

IMG_20200401_145437.jpg