We do think most Margays for long haul towing, with major equipment and large batteries, should have a 4″ frame. Local anglers will be fine with a 3″ and especially a 115 engine, the tongue weight may need some increasing for a more wide spread use. Plus Texas may have a 70-75 MPH Speed Limit, though trailer towing is regulated to 5 MPH less than listed, for those of you in Texas that dont know that. Many of those close to Sam Rayburn traveling through San Augustine can definitely verify the Tx Highway Patrols knowledge of that. BCB