hello fellow riders i just got back from a long ride and used my garmin navagation 11 gps. the gps worked fine but the problem i had that when i hit big bumps the gps came out of the mounting bracket and was hanging there by the electric connector.i went to a store and got rubber bands to hold it better that did the job but when i got home i dont see how i could tighten the slide down bracket. anyone have suggestions i would appreciate them thanks ivan