I like to sift my pellets to get the dust and small chunks out. I know some people just say the heck with it, dump the bag in the hopper. My Quad CB1200 doesn't seem to like dust in the auger area, so I like to keep it clean as possible. Anyways, I built a passive screener, based off the $40 commercial design and similar to what one of the corn burners built. It sits on a 5 gallon bucket that captures the little stuff and the good sized pieces get deposited in the other 5 gallon bucket. Its built with some junk Chinese 3/4" birch plywood I had laying around. I had some 24"x24" panels already cut, so thats the size I used. The screen is 1/4" stuff you find at Home Depot. No glue, all drywall screws so i can take it apart if needed. I did this real quick and didn't really care about a precision job, so pardon the craftsmanship! The pellets I used for a test was a box of different pellets I had laying around that needed cleaned. A combo of Energex hardwoods and a softwood pellet. I just thought I'd share some photos with the pellet burner community. Let me know if anyone has any questions..