Better solution for wobbly K-Edge Garmin mounts

I have tried a bunch of different Garmin mounts and as others have noted K-Edge definitely has a looser / wobbly fit.

The best solution I've found is to use a generic replacement insert (not K-Edge branded) in your K-Edge mount. These ones are nice and snug with the Karoo 2:

Amazon.com: Dymoece Bicycle Computer Mount Co-Polymer Insert Adapter Replacement for Out Front Bike Mount: Sports & Outdoors