Question about my tent trailer's electric brakes. At very slow speeds the brake controller, even set to the lowest setting possible, still locks 'em up. This makes for a real drag and the accordian like brake, release, brake is really a harsh ride at lower speeds. Can these things be adjusted back? If so, can the local RV place (thier hours suck so they are never open when I'm off to call) dial the activation point back or brake pressure applied down? Thanks. Big road trip looming in two months or so...Yellowstone for the first time for each fo the four of us.