I recently purchased a dust collector. Big improvement over the shop vac / dust deputy combo I was using. The only problem I found is that when cutting MDF on the CNC some of the dust was leaking out the top of the dust collection bag. I wasn't too surprised because it's a plastic bag strapped to a metal cylinder with a metal strap. I needed something for the bag to seal against. I picked up a bike inner tube for $5 and stretched it around the clamping area. That made a huge difference. I routed some more MDF tonight and I had zero dust escaping, plus the airflow was noticeably better, just judging by the amount that the dust collector bags were puffing up. Super quick and easy mod.