Endura MT500 MIPS Forehead Camera Mount

A forehead buckle type mount-plate for under-the-visor POV mainly for portrait capture. With the right angle, it helps to convey the steepness as close as perceived by the rider.  For some footage samples you can see my other similarly positioned mount for another helmet. 

Disclaimer: As with every mount/design, this mount may expose your expensive camera to damage, due to 3D printing part failure, unforeseen design issues, a crash, and the list goes on. 
Also, if you use the recommended 3M tape, it is strong stuff, in case you want to remove it, it may, or may not, be a hassle to be done with no traces. Use it at your own risk.

This mount relies solely on fixing tape. I avoided zip-ties since they would have to pass-through/interfere with the Koroyd tubes. For that reason I used 3M VHB 5952F double-sided fixing tape. Similar (or the same one) as on several commercial GoPro and others mounts.

Required hardware:

• 3M VHB 5952F 12mm (or similar strength fixing tape)
• (optional, if you print the quick-release part as well, see Details):
  • DJI/GoPro mount thumbscrew (or just a long enough M5 bolt with some extra nuts)
  • M5 nut.

Details:

• I used PETG. It should also be fine with PCTG, PCCF or similar. Haven't tested PLA.
• Gravity will work against this mount at harsh landings (drops, jumps etc), as such, the bolt needs to be tightened at around 2.5-3 Nm. To avoid braking at areas of high risk, I did the following:
  
  • Printed at slightly higher temp (+5 deg) with much less to no cooling, and relatively slow speed profile. Basically improve layer adhesion.
• My “finger-tight” with the DJI thumb screw, without excessive force was about 1.5 Nm (measured with a commercial torque-wrench). To easier apply the required force for a stable joint I made this small DJI thumbscrew tool. There are similar options online for GoPro thumbscrews.
• As most buckle systems, the 3-prong part can mounted both ways.
  • For attaching the camera I used this nice design: GoPro Quick Release Buckle.

Application:

• Lightly sand the area where the fixing tape is attached,  just rough it up to improve adhesion (see pictures)
• Also make sure to clean the helmet area of any oils, dust etc. I did a round of a bit of soap water with a sponge, and then a wipe with IPA (maybe overkill, also not certain if it affects the helmets plastics, be mindful with that one).
• After attaching the mount on the helmet, it is advised to apply uniform pressure for some time, and let it cure for several hours, do not go out ride immediately after application.

Note: 
I designed the curved area to match the helmet. The flat base used for clamping the buckle can be found here (Grabcad link).