Oh, the screening starts at about 2:07.

I bought a small electric sifter on Etsy for $49.95. It works really well. It arrived quickly and is well-made. The guy (Walt) can make it with screen sizes for your application. I bought the 1/2" and insect screening. It does both at the same time. I wanted the 3/8" screen so I'm adding wire to get the right size. I should have asked if he had the 3/8" - it's hard to find.

http://youtu.be/ZI_iA6w5uAI

Very cool. Thanks!