Dust collector Cyclone

This is a cyclone dust collector I made after watching the youtube video here (https://www.youtube.com/watch?v=1WnitgYFnE0). I have a 3d printer, why would I go to the trouble of using the plumbing connections... His method of connecting the two buckets by cutting off a small portion of the top bucket then going around it with a blade makes much more sense than the versions I have seen on thingiverse.

It appears to work well, I haven't generated enough saw dust for any comprehensive tests yet.