And it works! I finally got around to running ducts all the way around my shop to the lathe. I wish I had done this a year ago.
I made it so the cleat fits between the ways and can be twisted in place. That way I don't need to get to either end of the ways to slip it on.
I still need to tweak things a bit, like the location of the hose, the length of the 'banjo', and so on.