Minsvision - VESA mount

This is a remix from this:
https://www.thingiverse.com/thing:5401633

I originally printed that one, before realizing that it wouldn't fit my microscope.

I have a "Minsvision Stereo Trinocular Microscope", also known as the "Strange Parts Microscope". See https://goo.gl/XQX6s5

Uses a M8 bolt with a washer at the screw hole that the original mount already has for attaching it on shafts.

Inside the original mount there is a metallic ring that you must be rotated or removed so the bolt goes through the opening without damaging the ring.

It might be possible to skip rotating the metallic ring (requires disassembly, and removal of a locking screw), if you to use a short M8 bolt (15mm, or 20mm might work, not yet tested)