I've updated the design to support a "FORWARD" value, which shifts the mount forward from the bar clamps, setting this to 42 in my cockpit was enough to move the Garmin forward and away from the bottle so that I can refill it now without bumping it or taking it off, without being in the way of my hands. You can set it anywhere from 0 to a higher value depending where you want the mount to be. Thanks for the idea dfroelich!
https://www.thingiverse.com/thing:3791864
-Dan
https://www.thingiverse.com/thing:3791864
-Dan