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Go Pro to Garmin Varia Mount, or any other Garmin quarter turn device for that matter.
Important: before you put on the goPro mount, Mount and un-mount the Garmin device a couple times, it will be a bit stiff at first due to the 3D printing , but after a couple twists/mounts it becomes easy to turn and holds the Garmin device securely.
In the past I made it so it was easy to turn and lock easily from the beginning but I noticed that after a few months the twist lock would have some play, this happens because the nylon plastic compresses a couple fractions of millimeter after some time being under pressure this exess material that I added in makes up for that. This product and/or service is not affiliated with, endorsed by or in any way associated with GoPro Inc. or its products and services. GoPro, HERO and their respective logos are trademarks or registered trademarks of GoPro, Inc.