I was sampling a claim last summer and was running a few bucket fulls of assorted sized gravel through the Le Trap. I then got distracted and moved up stream to do some metal detecting and when I came back about half an hour later, there was nothing in the le trap other than gold flakes. EVERYTHING else was gone. I love the Le Trap, and I hear the Angus McKirk has similar results. I am all for minimizing the gravel I have to sort through during clean up. I am over the hungarian riffles.... way over them......