Pokeball Closet Knobs

My boys closet was missing a knob, so I decided to make them new ones shaped like pokeballs. (they talk pokemon all the time.)

It's a 40mm diameter knob, with a 4mm metric screw thread in the back.

My Ender 3 print thread wasn't perfect, so it took some serious force to drive the screw. (impact wrench). expansion adjustments in the slicer might fix that,

I started with this pokeball (https://www.thingiverse.com/thing:635900) by MoustachePolice, then added backing and a thread using