This is a set of two hose and pipe adaptors to attach a China cyclone (from eBay) to a Festool shopvac (in my case, a CTL Mini (up to 2018)).
This also includes a set of attachment parts to mount something onto a systainer or a shopvac with systainer support.
More details on this build can be found at
The hose adapters are adjusted for ABS printing with 0.7% shrink rate and a 0.2mm squish-out of the printer. This was done because the adapters rely on a snug friction fit to attach to the shopvac and the hose.