Love the parking brake and use it often. Sloped ramps are no issue anymore. In my model 4 I used to have to jump out while holding onto the Kitfox to quickly get a chock down so my airplane would stay put. With my Grove brake system and Grove parking brake, I can go to full power ( 100 hp Rotax) without any creeping forward. I was very conscience of every oz. of weight I added to my Kitfox during it’s build. The parking brake was worth every oz. it added to my empty weight which was not many.