Magnetic GoPro etc. mount
thingiverse
I'm really impressed with this 40 mm magnet from eBay: https://www.ebay.de/itm/Flachgreifer-Magnete-Greifermagnete-Ferrit-Durchmesser-10-125-mm/400538572621 To protect the surface, I added some thin rubber to prevent scratches. I used that stuff they sell to open stuck jars. Then, I glued a camera mount of my choice on top. Check out this video for more info: https://www.youtube.com/watch?v=g9iyADPhPCY
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