Thanks guys. I got the thing back together again. What a chore! I almost didn't have enough head room. The best part was getting it together, figuring out how to line up all the little wheels, then wondering why it wouldn't lock in place. Then realizing what that extra little knob at the bottom was for...Clearly some alignment work awaits--I can see that the lamphouse is a bit askew from the neg stage.
Those bolts holding it up seem like a dubious arrangement to me, though--it looks like it should have an extra clamp or three, just for security.