I recently got my Oneida V3000 up and running. I'm using my old 2 hp blower to suck dust from my scroll saws. I've run the exhaust pipe outside and am trying to come up with the least expensive way to reduce the outside exhaust noise. My exhaust pipe is 4" SD PVC. I'm thinking about making a muffler using more 4" pipe with a bunch of holes drilled in it running through a piece of 6" SD PVC packed with fiberglass. Do any of you have a better suggestion? Thanks in advance for your help..