I still have my fancy new 2HP Grizzly Cyclone set up and ready to go, but with no ductwork installed. I borrowed the book "Controlling Dust in the Workshop" by Rick Peters from a buddy hoping that it would answer a few of my simple questions, but so far all it's done is confuse me.
For the most part, my machines all have 4" dust ports, whereas the collector has a 7" input port. My "understanding" (based on *what* I'm not sure) was that I should run 7" ducting from the collector and defer the reduction to smaller diameters in a gradual fashion, perhaps based on my branching needs and/or some magic formula I thought the book would reveal. However, it instead seems to imply that I could (should?) reduce from 7" down to 4" right at the collector and run nothing but 4" ductwork the whole way. Is that logical? Which approach is "correct"?