Hi. Brought the new 303 home and loaded up for the first trip. Found a side road to set the gain. At 25 mph it slows the same on every number from 6-10. I stop using the trailer brakes, but I can’t get the brakes to lock up. I know I’m within weight. I read on another thread that the trailer brakes might need adjusting, but is that a consideration on a new unit? Thanks!

2013 Ford F-250 Diesel
303RLS