protective Face mask

This thing caused me to get banned from CR-10 User forum at Facebook.
I used my free speech right to explain the real history behind this desing.
The admins didn't liked my personal opinion and Rob von Bothmer banned me when i protested about the admin decision attitude by deleting my group's shared files.

I have free speech in this part so i am gonna express my opinion about this forum here:

1) the forum is an effort of users to update, fix and improve the machine, they make great conte