I have a Castle 240, 25 volt that does some strange stuff. It has a hard time backing off the throttle for some reason and of course its always far away from me. Most of the time have to push to brake to make it slow down or stop or it will take a second or two to stop. Programed many times to no avail. Changed the reciver and no difference. Ive learned to drive around this problem so its just a nusance to me. What do you guys think?