Ball protector snooker

Can be used in a game of snooker to cover a ball near a cushion to enable the player to bend over the table without fear of touching the ball (which would be a foul). The .stl file describes the object upside down so that it can be printed without overhangs. The .scad file is as parametric as I was able to make it, in other words, changing one of the dimensions should automatically update the entire object. PLA should be more than sufficient.