qwertyu, it's the thickness of the lid that's the problem. If orraloon was using a collection container lid as thick as the one pictured above to mount the cyclone on that was his problem too. One of these small cyclones is much more efficient than a chip collector so don't even bother with one of them. When I was selling these cyclones virtually all the problems buyers had were because of thick lids, unless they were doing something totally stupid of course. Any users who followed the instructions provided with the cyclone didn't have any problems.