This is an update to my original CPAP hook that I had posted many years ago to Thingiverse. It never fit securely and would sometimes make the sound one would expect from a piece of plastic sliding across a wood bed frame.

The new design has a peg to hold the mask that is threaded at one end and will help to clamp onto the bed frame. Simple change that has made a great difference. I have the bed frame set to 28 mm thick but I have parameterized at least part of the model so if there is interest in my posting the Fusion file, let me know.