When I tried to estimate how much my DC system was going to cost, I never imagined I would use almost $15 worth of pop rivets, or two $20 rolls of aluminum tape, or wear out an abrasive blade on my metal chop saw, and that is with the revised shorter system almost in place. I cut out almost 40' of pipe because I was worried about losing too much air flow.
By the way, we had a 5.4 earthquake about twenty miles away today. I might have lost the super gorilla if I hadn't bolted it to the concrete. It is REALLY top heavy.
Rick Potter