The 3d-printed frame is attached to the back plate of the HDZ using two of the threaded holes near the top, and using a custom piece that plugs into the “foot” of the HDZ (and covers lower v-wheels at the same time)
Details here. It’s kind of ugly/bulky, but so far it has worked out to be convenient.
Got the hose from a local (French) supplier for wood workshops, it’s just a 50mm (2") antistatic hose that they sell by the meter, I bought 3 meters to be able to route it from the top of my enclosure down to where the cyclone/vac is. I bought it specifically because of the antistatic property / ability to ground it by connecting that copper wire that runs inside it, but I have been too lazy to actually do it yet.