TENNIS BALL PRESSURIZER

This is a Tennis ball pressurizer. I wanted one and i tried my alpha prototype with the Tennis Can Ball the easily keep 1.8 bar. I wanted something easy to bring and that can be immediately used after a tennis match.

I would like to test but i don't have a 3d printer, unfortunately i can't.
I want to test max pressure of the pressurizer and the type of o-ring that would be better to use or try to do a silicon one.

I think a good setting for the printer is near to 100% infill because it ne