I have the SUPV1 car kit for a Sportster 4 radio. I've only had it for about a month and now when the radio is mounted on the dock, it is so loose that the radio just falls face down. The part that is loose is the end of the suction cup mount where that little ball is. Please see the attached picture, I circled it. Anyway, does anyone know how I can tighten this or rig it so the radio wont fall face down? Any ideas would be great, thanks!