Well, it turns out it was the MC. Rich at Midwest gave me some steps to check. First, was to get them locked back up, then crack open the line to the MC. If that un-locked them...it meant the MC was bad. Sure enough, as soon as I cracked the line open, the wheels turned freely.
Sort of glad it was the MC. I did not ever trust the old one, I rebuilt myself. But it did work for a couple of years.
