Make of this what you will, I happened by chance to find him and enjoying his journey, highs and lows.
not your typical bragging northern hemisphere blowhard.

Building a Cyclone (DIY dust collector part 1) - YouTube

Building a Blower (DIY dust collector part 2) - YouTube

Building a cyclone dust collector (part 3 of 3) - YouTube

interesting comments at very end of 3rd vid.
a copy of clearview
6.5 months in making $US2400
??CFM
motor draws 12amps
88 DB's

he is not happy with the project. classed as a failure, possibly improved by bigger impeller with more blades, but at time of video he couldnt care.