I Pull my H260 with a full size Ford van set up for a 12,000GVW with 5.3-liter engine. Van 5200lbs; boat 5400lbs; 600lb tongue wt. On smooth roads you don't know the boat is there. Still, I often get sway between 55 & 60mph. This occurs on bumpy roads, with gusty winds and when dueling with 18-wheelers. This problem has been discussed in this forum before but I've slow-rolled the solution 'til now. I'm taking the boat to Key West in April. The most common solution for trailer sway is the equalizer-type hitch used for travel trailers. Used one in the past, but the Equal-i-zer company is the only mfgr that certifies their hitch to work with surge brakes. Hitch is also available at a discount at RVwholesalers.com. I'll let you know how it works out. Better pics of the setup are at: http://www.kobernus.com/Equalizer/index.html I've also included a link to the Equal-i-zer company.