Several years ago I upgraded from a 2hp to a 3hp Oneida cyclone system. The old setup had four 12" x 96"tube filters which were great but because I had built them into a 30" square bumpout closet there was insufficient room to use more similar tubes for the greater filter area required for the new system. I installed the 130 sq. ft. cartridge filter that came with the Super Dust Gorilla but hated the mess that resulted when the bin inevitably overfilled. Anybody who has had that experience knows what I am talking about.
I realized I could get the necessary filter area in my closet by using an array of smaller tubes, so I ordered fifteen 5" d. x 98" polyester sateen filters with snap rings from U.S. Air Filtration, cost about $300. They were very helpful and easy to work with. The new tubes have about 163 sq. ft. of surface area, 25% more than the cartridge.
I machined two 3/4" plywood decks with 5" holes on my cnc router. One was fastened to cleats in my existing inlet plenum and sealed with expanding foam to the closet walls, and the other formed the top of a lower plenum with a dust drawer. That plenum is a simple box with screwed butt joints sealed with silicone caulk. The drawer front is sealed to it with foam weatherstrip tape and turnbuttons.
Industrial setups with tube filters have elaborate cleaning systems with shakers and pulse jets, but a one horse shop like mine can get by with an occasional whack with a paddle to knock off the dust cake. I won't miss cleaning the cartridge pleats.DSC_0661[1].jpgDSC_0657[2].jpgDSC_0658[1].jpg