FCS GOPRO
thingiverse
I use a GoPro plug as an FCS, specifically designed for my stand-up paddleboard's speed coach attachment.
Download Model from thingiverse
With this file you will be able to print FCS GOPRO with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on FCS GOPRO.