Do any of you boat pullers use a weight distributing hitch assembly? I have an old EZ-lift that I used on a 20' travel trailer, but a hitch welder told me today that they can have a negative effect on surge brakes.. Any truth to that? The boat drops my GMC 150 rear end about 1 1/2 inches when hooked up and I thought maybe I should shift some weight forward. Any suggestions?? (The boat is a 20' Bayliner cabin model, '89', on a dual axle King trlr.)