Created a customized version of this model to fit my lenses, which had a different shape and were a bit thicker than the ones used in the original model.

Also, I had some issues with the hinges breaking due to how they were printing, they would easily break due to the z-axis being the weakest and the fact that the hinges are small and take a lot of stress when dropped. So as a solution I created replaceable hinges that can be printed with the z-axis going the opposite direction, making the hinges much stronger and allowing for easy replacement if one does break.

Onshape Link: https://cad.onshape.com/documents/2a16edcf865b798cddf1eb20/w/394f4085014c9f469bbabcfb/e/2e4ea8b57c9fe20094d186f0

Disclaimer: This is my first attempt at using Onshape, so please forgive any issues with the model.