Sizes can vary source recommendations; 4", 6", both, other? All my 6" duct is solid right up to the connections so I cannot comment on 6" hose sources. 4" hose, I buy the clear with wire helix that Woodcraft and others sell when it is on sale. 6" gates, especially in that number, would probably be best if shop made. For 4" and smaller gates I use the plastic and the metal ones that Rockler and others often have on sale for a few bucks a piece. If making them I would go with self cleaning and just design around the additional space requirement. With a 2HP cyclone and 6" mains I have never had a clog issue with the non-cleaning ones but, the gates mostly are positioned "sideways" if that makes any difference.
Last edited by glenn bradley; 10-24-2012 at 12:57 PM.
Any sufficiently advanced technology is indistinguishable from magic.
- Arthur C. Clarke