After exploring numerous lens cap designs, I noticed that many didn't quite fit properly. This led me to take matters into my own hands and design a custom lens cap using Fusion 360 and share it here for others to enjoy.

What sets this lens cap apart is its versatility. It can be conveniently used even when the lens is stowed away. Its slim profile ensures it clears the base during closure, though it's essential to double-check for proper seating. I disclaim any responsibility for potential damage especially if it is not fully inserted.

I've experimented with various materials while 3D printing these caps for friends, ranging from standard PLA to PLA-CF. However, my personal favorite is TPU due to its flexibility, making it notably easier to insert and remove.

Please credit @PixelatedDad if you use this :-)