Well Thomas/NH. Thanks for the intro to laminar flow. After about 20 minutes of browsing - I now have an understanding of laminar flow. Wondered about how those fountains did what they do. Always good to learn something new on this camping website. :)
RE: The OP, start with tire pressures, make sure you are not under inflated. I had a P32 for a while and became more aware of trucks in my mirror that were coming around me. Amazing what moving over a foot or so can do to minimize the "suck" of the truck. wolfe10 had some good suggestions. The bell crank wear is a common problem with the P series I think.