@ntouched here’s an easier solution than 3d printing – just found this on the same bmcuser thread where I learned how to print rings myself. A company that makes the rings from high-quality materials at a much cheaper price than Duclos – https://www.cordvision.com/product/lens-gear-easy-install/
Those Cool-Lux gears look pretty sweet. The main problem with 3-D printing them is that you have to get the measurement perfect, which means using calipers. And even then I had to use a file to get one of them to fit on the lens.
Can you tell me more about modding the e-mount adapter? Are you using a Metabones speedbooster e-ef on top of that? And the ef lenses communicate with the body? Thanks:)