A vaccum cleaner attachment for the popular 110000RPM handy blower dual 21700 version. It contains 3 cyclone dust separator, a dust can and an optional post filter. 7 M1.4 screws is used to get everything fixed.

It's not well calculated or simulated, just made for fun. I think the path of the inlet air flow may be a little too narrow, but anyway it really works a little at least.