Eleksmaker A3 borescope mount

thingiverse

This mount takes standard 5.5mm borescope/endoscopes that you can purchase for <$20 at Amazon et al. This mount is affixed using the laser adjust thumbscrew holes. Put a 4-40 screw through the camera clamp to fix the endoscope in place - but don't tighten it excessively or else the borescope's front glass aperture'll break. Make sure the laser dot itself is just outside the camera's field of view, or else the camera will slowly get stuck pixels.