x210 Session or Polaroid Cube Mount

I found a lot of the camera mounts far too complicated for my needs. I personally use a Polaroid Cube+ on my x210, which has similar dimensions to the Runcam 3 and GoPro Session cameras.

This mount will need either a battery strap or strip of velcro to secure it to the top plate of the x210 (see images).

The aperture and side walls are dead centre on Version 1. On Version 2 they are slightly raised, as I found the mount sat slightly lower when the battery strap is tight.

I would advice