GoPro chest mount adapter

General

• I'm probably not going to print this for the foreseeable future, even to test fit, because I already have a replacement
  • therefore, fitment & hole sizes are provided by best guess
  • if you're the first one to print, please post a make & comment on the fitment
• ideal for an SLA print to capitalize on more isotropic strength
  • suppress the SHELL feature to make it more FDM friendly
  • recommend a more ductile material like PETG in case the hole sizes aren't great
• rev 1.1 should be used, rev 1 is just an old backup I made while testing CAD tree changes

Features

• mostly a replacement for the original GoPro arm
• uses M5 x 20 mm screw, I recommend a button head
  • I don't care about the adjustment knob for tool-free adjustment
  • if you do, I suggest a much longer screw to fit whatever knob you choose to use
  • stock screw is about 45 mm long (shown left, below)

• the OEM injection molded plastic arm (shown right) uses pitifully thin wall thicknesses to capture an acorn nut in a pocket, which all broke when I tried to remove the fixing bolt
  • therefore, I beefed up this area significantly
  • pocket depth is 5 mm, sufficient for a nylock nut which should be an improvement over the stock acorn nut (no anti-vibration capacity)

Instructions

There's a side release buckle (shown in center) that mates with the flat chest mount plate:

• You're going to reuse this part & the included screws (qty 3) which appear to be M3 x 8 mm CSK thread forming screws.
• fasten the 3D printed arm to the buckle with qty 3 screws
• assemble GoPro to taste