I (we) think we have it figured out ....
I called in my engineer better half to look at it.
She wanted to look at the exploded view in the
manual.... Looks like the little bolt that shows
on the surface of the drum is the only thing
that secures the clamp ..... If I can get needle
nose pliers, or something, on the nut underneath,
I think I can get it out, fix it, and reinstall it ....