High resolution M2021 housing lens adapter (reworked from scratch)

The original model had many issues, most notably the resolution.
The threads would also extend into the adapter's body, essentially making it hollow and less sturdy (refer to photos). 

I reworked it from scratch and fixed the issues. I also made the walls a little thicker and made it easier to grip and unscrew. 

I tested out many things, the one I'm uploading has been made to fit the inverting lens with an o-ring which usually comes with the lens. 

I also made the threading part slightly shorter (.3mm), because otherwise, it would change the angle of the adapter ever so slightly and mess with the focus. If you overtighten the adapter to the housing, the lens might push on the “lips” too hard and bend them slightly. 

Better resolution, fixed threading issues, fixed threads extending into the body, more study, better focusing etc etc