I figured out what part of the controller is making it move on it's own. It has two nobs on the right side that say "TRIM 1" and "TRIM 2". If I turn the one that says "TRIM 1" all the way to the left it I can make it go forward and back with the controller but I can not steer it. If I move it at all from being all the way turned to the left it will move full speed on it's own again. Is it fixable or should I find a new one? If I need a new one what kind should I look for?