Hi, I'm Tim. I'm not actually a woodworker at all; I make knives and am trying to learn about dust collection systems so I can build one for my grinder. My plan is to build a Thein cyclone to collect all the metal dust in my shop. I'll put a spark arrestor fore and aft of the cyclone for safety, and I'm considering building a fire suppression system into the device. I can almost hear all of you wood workers saying "this is OVERKILL!!", but trust me, metal dust fires are SCARY!