Hi Guys,
Been watching this thread for a while.
Firstly, thanks for the awesome work, it is great that you have gone to so much effort on this. Anyway I thought I would try to offer some input (which may not be useful)
A couple of things I have been thinking about:
1) I am quite keen on not having to turn down the hubs to keep my 410 restorability as high as possible, but also don't want to have to bore out rotors each time they get replaced. I believe that the rotors therefore need to be 73mm bore
2) The welded ears on the brackets may cause cert issues - I understand in NZ that typically certifiers like to see either dowels or bolts through anything like this (based on discussions with a guy who works closely with a certifier on a regular basis)
3) If the rotor height was not as great, potentially the ears on the brackets would not be needed as the rotor would effectively sit further forward, therefore the caliper wouldn't need to be set back, and the custom bearing spacer may not be required. Given that the thickness of the bracket by which the caliper is recessed is 3/8 and the bearing spacer increases front spacing of the rotor by 1/8, a total of 1/2inch or 13mm would be the minimum height reduction of the rotor. Anything greater then that in reduction would mean forward spacing of the caliper.
I am not sure if the above is all correct, but thought I'd through it out there. I have also put together the attached table of rotors comparing some G20/P10 Primera rotors to some Vannette C20 rotors, that may do the job.
Let me know what is off the mark here and I will go look for alternatives.