Tested on only a handful of optics so far - please let me know if it works for you and what scope/optic you have used it on!

This model is designed to be 50mm diameter - simply measure the diameter of your objective lens, divide by 50, and multiply by 100. That is your scale percentage, which you can adjust in your slicer to get the proper size. 

Make sure to use Arachne wall generator to be able to print the honeycomb walls. 

So far I've had success in printing in PLA+, PETG, and ASA. Recommend PETG for better layer adhesion and flexibility