Scubapro 108/109 Diaphragm cover by James1979
Modeling it in FreeCad was easy... I'll try printing but I have concerns about supports. If anyone has a dual print head and can run a separate support material, this design would probably be a great candidate.
edit to add: support worked out, but still need to iterate until the design is right... will work on it more later. I did post the FreeCad Files if anyone wants to adjust from what I have.
Thats great! I will try it too.