Ok I was playing around and designed this blower I have no Idea of the engineering aspects for cfm or anything like that but it might work?? I am thinking I would stack 4 frame pieces to get the cavity then put the left and right cover on and bolt together for the body not sure about impeller but thought you guys might have some ideas. Was thinking small pillow block bearings on either side or just delrin bearings? Oh ya It has a 16" diameter.   Rob