Rear Lens Cap - Pentacon Six (P6)

This is a design for a rear-lens cap for the Pentacon 6 (P6) mount, seen in lenses for Pentacon and Praktisix cameras.

This thing was made using dimensions from a thing made by photo-krause

UPDATE 2017-09-24
This design is now tested and working.
The following changes were made:

• It's now deeper
• It now has a stopper (to keep you from being able to turn it with no limit)
• It now has custom supports

UPDATE 2018-11-21

• Now prints without supports!
• Massively improved fitting. Gradually tightens as you turn.
• No longer snags / gets stuck on the lens when trying to take it off
• Reduced filesize
• Grip pattern should be less print-time intensive (A version without the pattern is included regardless)