I use the RAM mounts on my Garmin 550, Drink holder and my Spot. My only complaint is they are a little pricey but very functional. (multiple positions) The security screw on the gps mount in a major PIA. I tried to leave mine loose on a recent trip and it would always screw itself in and I would have to get that stupid little tool to get the GPS off my bike every night. I'm going to remedy that.