hello all, i have a 1993 glastron ssv175 and a ez-roller trailer... the trailer does have surge brakes i dont even know if they work... how ever the coupler is badly rusted and does not work very well anymore.. the trailer is not original to boat .. do i really need to buy another special coupler for surge brakes? or can i just cap the lines off and put a regular coupler on? its only 17.5 feet long nothing serious..what do you guys think?