congrats Nathan! Nicely done video.
I'm sure that these liners are great for some users. It really is a great idea and it does work to reduce the leaks but it creates a constant (tiny) leak all around the mask that was just intolerable to me. Instead of the mask feeling warm around where it touched my face it was now very cold and uncomfortable to me. I have a high pressure of 18/14 maybe that's why? I also found the liners hard to deal with because they are so small and flimsy, curl up, hard to keep in place. I ordered the ffm kind and I'm not sure I got the right kind because there was only enough space for the nose and the mouth area was covered. I know you could breath through it but I found that uncomfortable too. I think the product could be improved by having it attach in some way to the mask or by making the edge of it stiffer or something, I don't know. I'm not trying to put down the product but just to give my experience with it. I'm glad you designed it and hope it helps many people.