Has anyone had problems with their Garmin edge brackets? I have had 3 brackets so far as they seem to loosen up and rattle after a couple of months. Then on Friday when travelling at speed the bracket snapped off sending my Garmin flying down the road and under a car wheel. I phoned Garmin and they don't want to know even though it's still in warranty and they are adamant the bracket is sufficent. So 325 quid down the drain!