Tucker Rocky taper lock kit
Parts from cyclegadgets.com, great people to deal with by the way.
RAM 11mm hole base
RAM short 1-3/4" arm
Garmin Quest cradle
Cradle mounting ball
Above all the parts needed to mount the GPS to the ST3
Remove rubber piece from handle bar
Install taper lock kit
I will have a full review of this GPS after my trip, also I'll compare it to the Garmin V GPS that I used to use before. My Garmin V broke last year, that's why I had to buy a new unit.