I purchased a Grizzly G1029Z2 2 HP dust collector a couple of months ago and it came with a "free" Woodstock Cyclone trash can separator lid. I thought the cyclone lid would be nice and would help keep heavy, hard objects away from the impeller.
The dust collector is proving to be a very good machine. I haven't had a chance to install a permanent duct system, but dragging the hose is working well, and it lets very little debris escape from my G0453 planer or my 6" Powermatic jointer. It does well with the cabinet saw but a fair amount of dust still comes out the top.
BUT - I LOVE the freebee trash can separator. I noticed, when I put the dust collector together, that attaching the bottom bag was a little fiddly. Getting the bag in place while slipping the band in place was going to take practice. So far I haven't had any practice. I just dumped the 8th or 9th trash can of debris, and the collector bag is still only about 20% full. It's cyclone action is evidenced by the sharp peak of debris that builds directly beneath the inlet port, and the swirling material you can see if you crack the lid with the collector is slowing down. Granted, I have been planing quite a bit so a good deal of the debris is heavy. But I can tell that that cyclone lid is going to be a great labor-saver.
I highly recommend this accessory.
RonB