Montana Mask Utah Edit GOST 8762-75 threads + big filter version

thingiverse

This adds GOST 8762-75 gas mask threads to the Utah mask, with the outer thread remaining unchanged so you can use the original lid alternatively. I created a lot of things recently using these threads, so I added them here as well - maybe I'll need them later? The files named Utah* are originals. Update: The retention body may turn in both the original and my remix, damaging the filter in the process. A new file with blockers has been added. Update 2: The big filter body from below has been added to the mask - it's yet to be tested. For other parts of the filter, please see the linked filter. Update 2.1: Make the inner hole bigger and change the filter support accordingly, making it optional. Also, add a version with support that should avoid having to generate support material by the slicer for the open hole version. Note: Slic3r does not slice this well, but cura manages to create bridges. Alternative Filter, bigger area, better breathing - you'll need these files for the big filter version: https://www.thingiverse.com/thing:4280911 The original Montana Filter adapter: https://www.thingiverse.com/thing:4260420 --- Edit: I found that the original masks have a non-commercial license with a recommended price cap of $2. https://www.makethemasks.com/faq