I have been using a box fan with a furnace filter hanging behind my lathe for a while now, and for the most part, it seems to work well. I've been thinking of upgrading to the typical dust cyclone/fan system. However, given the challenges of trying to collect dust using a suction system and the fact it's the invisible stuff that kills you, I am starting to ponder the idea of designing a sanding/spray booth like they use in industry. Any turners have their lathe in a cross-draft booth for dust control? Anyone have a sense regarding the feasiblilty of designing one using common MERV13 furnace filters and still catch the invisible stuff (PM2.5)?