3D Printed Sphere Ball Marble

Have you lost your marbles? Why not prints new ones?

https://www.youtube.com/watch?v=e-pivvMCHX4&lc=z13xwze5ctvbznnj204cehk5yomvifpxiik

I wanted to 3D print a sphere to replace lost marbles for a 3D printed ball launcher that I was working on… ended up with this… no more lost marbles :)

Materials used in build:
screw used #4-40 x 1" machine screws, round head, steel
filament used http://shop.prusa3d.com/en/filament/46-silver-pla-filament-1kg.html

3D Printed Sphere Ball Marble on O