I bought 3 sets for me and 2 other shooters. So far I've seperated about 2 - 55 gal drums of brass, what a great time saver! I dump 1 large coffee can full in the top tray, with the others underneath resting in the top of a plastic 5 gal pail. I try to pull out all the rifle and larger cal brass from the top tray then sift. The calibers smaller than .45 fall thru except of course the cases that nest in the .45's which must be pulled by hand. The next tray (.40 cal & 10mm) goes faster, sifting drops the smaller cals thru and the .38's get caught by the rim and are left hanging thru for easy seperation. The last tray (9mm) I sift over the 5 gal scrap bucket since the .32, .25 and .22 are going for scrap. Thru each tray you have to pull out the blazers (aluminum) and throw those in an aluminum scrap bucket.
I figure thay cut my sort time by at least 1/2.