that is a very cool evaluation, it sounds like you spent some time figuring out what works and what doesn't. I am revamping my setup now, testing different weights and conditions. I have redone my whole setup to just fill and empty one sack, a Fat Seat. It is the best of situations for me. We should get together and evaluate things, I live on the east side of town, you are on the west, but we should get together! I have two boys, 10 and 13, they live to wakeboard.