Parametric lens cap for scopes

Edit 1/16/23 

I've added an improved version with a small lip on the lid that seats into a groove in the base. This provides a more positive closure. 

Parametric flip up lens cover for scopes that I designed using Fusion 360. Open the .f3d file in Fusion 360. Select the Modify tab, then the Change Parameters towards the bottom of the list. A window will open and adjust the top 2 values in the Expression column to match the outside of your scope. Both values for outside diameter need to be adjusted and equal to each other. The joint is sized for a piece of 1.75 filament.

Recommend TPU for the base so it is flexible and will be a snug fit around the scope.
Recommend PETG for the cap and pin for the joint.

Feedback is welcome.