I have a 350LM which is mostly used on my 98EV with the built-in charging cradle. However, I often move the device with a saddle clamp to my Falcone or to borrowed/rented bikes. The RAM ball mount systems are the best, but they won't adapt to the different ball mounting size of the Garmin cradle. That is, unless you have a lathe and a mill or drill press. I bored out the center of the Garmin cradle and built an aluminum slug to handle the mounting of a 1" Ram Ball. See here:


I just completed a 12 day tour of Normandy and Brittany with this clamped to Falcone Sport handlebars and never had the slightest worry about dropping the device.
Patrick Hayes
Fremont CA