Since I am building a booth for powder coating I was thinking about mounting a regulator and water filter on the booth. I had to buy a new air compressor as mine died recently. I bought a 17 gallon Dewalt which is overkill for this use, but I use it for other things also, nailing etc. I know that I don't need a lot of pressure, not really sure how much just yet. I thought I could mount a regulator on the booth to step down the pressure from the compressor as they seem cheap enough and also a water filter as I have read humidity can be a problem. So if I do that I may as well have a short hose attached to the booth also and wondered what size people are using for the Harbor Freight guns. Thanks for the help.