I am looking to purchase a Grizzly G0548ZP pretty soon and want to re-do my current ducting. I currently have a harbor freight D/C but find that it lacks the cfm for my needs. My only issue is, my separator trash can only has 4 inch ports on it, and I was wanting to go with a 6" main line. Would I lose any by keeping the D/C at 4"? I read elsewhere that the more cfm's, the bigger the main line should be.
Thanks again