Seen the "Dustopper"? It really looks like a straight up rip off of the Thien baffle design. :(
dustopper.com
Interesting! I wonder how much research they put into their design?
I own one of these which I connected to a Festool Sys-vac (with a tiny bag) and it works extremely well. As per usual, I end up with only the finest flour in the vac bag at a rate of about 2 oz for each 1/2 of a 5 gallon bucket.
As you can see from the photos posted by the OP, the inside of the top has a honeycomb texture and I wonder if this improves performance?