J. Phil Thien's Projects

I'm new here, I have read a lot of info on DC's and have some questions on the separator. Everyone I've seen runs 4" or 5" in the separator. I am going to buy the HF DC and as per Phil Thien (Thanks for your site unbelievable amount of info) are going to change the intake to 6". Will the separator work with 6". I want to run 6" to all my machines, TS, jointer, surface planer, CMS, drill press, and BS. Approx. how long of 6" pipe will still work.