I have a RAM mount system (cradle, arm, base, etc) for my 2720 and on a ride recently, the 2720 unit starting "tilting" down after 30 or so miles on some back-roads. When I try to tilt it back up, it won't move unless I first loosen the twist knob on the "arm". This RAM mount system is less then 2 years old and has never had any problems before. I remove the "arm" and cradle assy after each ride, and have never had the slipping problem before. Do I need to clean my "balls" with something? (With all the PMS out there, I know that I'll get a lot of responses on this one.) I sent RAM the same question today, but with the MLK Jr holiday, they're probably closed until tomorrow. Thanks!