Has it really been a year since I've touched this project or even thought about it? Wow!
This year I finally got with modern prop building times and purchased a 3D printer. This has allowed me do some proof of concept tests on how they might have gotten the base rings to match up.
Recapping:
-I know the short optic lens I own has different threads than the tall/silver optic lens and is also slightly larger in diameter.
-The short optic lens came with some sort of knurled adapter ring that looks like the correct ring according to reference photos.
-The tall/silver optic Mirax Laborec lens has undersized knurling machined into it that is not seen on the Ecto Goggles, and it would inhibit a true T-adapter ring from being used on it. I believe that lens was only designed to mount directly to the Mirax Laborec Camera
My original thought was they might have found some adapter ring that would cover the natural machined-in knurling on the silver optic and at the same time making the two base rings the same diameter (As they appear to be).
Now that I have a 3d printer I can put that theory to the test. I designed a t-adapter style ring for the tall lens that would be the same diameter as the short lens ring, but allow the machined in knurling to "live" inside of it and be hidden
The 3d printed T-adapter would mount from behind the faceplate, only about 1/2 way exposed on the front.
This was my happy moment, this really makes me think the theory that they shoved the Mirax Laborec into an additional ring adapter plausible. Besides my knurling being a bit oversized, it looks very close to the hero prop setup now
I made a short optic version as well for proof of concept, with a lip added for mounting to the faceplate.
And for the first time in years....My Mirax Laborec Adapters are on a frame!!!!!!!!!!!