woodworkingboy
TreeHouser
That's good about not restricting air flow. I have an old 020 that the flock or whatever it is has half disappeared from the filter, so it is partially an open shot of air coming in. I've been running it that way for quite awhile, due to being half lazy to get a new filter, and half an experiment. It runs like a bat out of hell. Saws like unimpeded air flow.