[Humble]

Not to pry too deeply but are you working on a 2 piece rotor and brake setup for super's and/or standard bugs? I've been looking at off the shelf options using wilwood, 2 or 4 pot calipers and 2 piece 10.75" rotors.

As for brake rotor/hat assembly, the floating race setup is nice but not necessary for most applications. I'd go with the threaded hat or the stepped bobbin to keep things simpler.