Actually, it only took about 10 minutes for the actual doing. The thinking part took about 5 years...........
I was using an old wheeled music stand for my hood: rolled it back and forth as needed. Piece of T-track, piece of scrap wood as a hold-off, 1/4" bolt and a knob.
I know I've never seen this before, because I would have stolen the idea at the time. So much easier to move the hood and so much easier to clean behind the lathe without the wheeled contraption.
The other title I was thinking about was "whither thou goest, I will go" since this now has to follow the headstock.