Just posted a review of 034Motosport's replacement rotor rings for this rotor upgrade:
https://f80.bimmerpost.com/forums/sh....php?t=2077726
If you guys are interested in what the replacement looks like or want to see the bobbin system in more detail you can check it out there. I tried to take a lot of photos so you guys can see every little detail.
Also
jfritz27, I remember you said your rotors are getting worn down, so if you wanted to see what the replacement rotor rings look like before you purchase some new rings you can take a look at my review thread for them. I also have some instructions posted so you can see the torque specs and tightening pattern etc ahead of time so you know what you might need to do the job properly (a torque wrench that can accurately torque down a low torque rating, and blue loctite).