COVID-19 HEPA Face Mask + Optional Shield Personal Protection Project

I put some great project components together to come up with a comprehensive modular PLA printable face mask with an integrable and fully optional face shield. This is in lieu of any N95 equipment, has a full face seal feature, and while it does not have any medical or safety rating, and the actual filtration depends on the filter media, it is an open and fairly comprehensive project that I am able to print in decent quantity for my family and friends. I like the options already out there, but when I put some of the best ideas and concepts of some other projects together, I was able to print a more complete solution that works for me in way of a reusable and sanitizable mask that offers serious airtight facial coverage, optional eye and full face shielding, valved intake/exhaust flow for media longevity, multiple layer options of non-standard use filter media, ability to stand up to daily wear and tear usage, and one that is relatively easy to make and custom fit. We shouldn't (