One step forward, two steps backwards.....
so.... The rotor above failed the runout test... to the tune of .015-.020" at the outer ring.
This was a rotor I'd taken apart last year before I decided to make all this tooling. Closer inspection revealed signs of previous abuse with a blunt object. Before you say it.... yeah, I'm gonna do a much better pre-inspection from here on out...
hangs head in shame...
Anyway, moving on... had another rotor that I disassembled at the same time, so I pressed it back together to check face run out before I wasted another 20 bucks in wire and epoxy... not to mention the time. Ran true to about .001".
While checking it, I noticed a distinct wobble in the shaft the bolt goes through.... There's literally no way to bolt the shafts together straight with any kind of repeatability. That doesn't affect the runout check because runout is checked against the taper.... but it absolutely won't allow for a balance check on the knife edge. It wobbles up and down like an out of round tire.
Plan B... a single taper shaft....
Turns out this project has a steeper learning curve than I anticipated.... but I'm getting there.