My son and I are trying to remove the antenna so we can remove the fenders so we can replace them with the glassworks fenders but we won't ever get to that point if we can't remove the antenna. Turns and turns and nothing. One of us has even pulled up on it as we read to do in another post, while the other turns, and nothing. Do we have to go to the dealership? What do they do differently? and what do they charge to take off the antenna? Thank you!