Breathable Mask Spacer

Cut the bottom of the front ring holes with a cutter,
( there are 2 levels of holes, choose internal or external). Insert the 4 frame branches in holes of front ring and put a drop of glue (CA glue). You can use a bowl of hot water to help bending the frame (around 60 degree).

The bottom of the mask has to be inserted in the 2 clips at the bottom of the frame.

This is a work in progress, let me know if it's convenient for you!

Edit: i added a picture inside a mask, it is a reduced model at 75% (except height) for my wife

EDIT: I found i much better concept/design here https://www.thingiverse.com/thing:4616510