I just bought one of these mounts, I have a bunch of RAM mount gear but I've never used the ones like this. Thanks for the heads up!I use the Garmin Montana for years now with Trakmaps and run a fairly easy setup with zero drilling and is in a good spot for riding. I like the closer to me, as I don't like reaching up towards the windshield to use the gps. Also, you can buy a super simple setup from anybody that sells the RAM mounts. I use the AMP mount made for the Montana like others but i use a different way to mount it all off the riser but towards the bottom and then use a long arm to adjust it. It's a ball with a 9mm hole that you can simply screw into the underside of any riser. Just put your riser bolt through it and tighten it up. Done.
This is on my old 1200, but new one is basically same setup.