Utron with spherical container -bottom

hello This is the bottom half of the Utron, a device from the minds of Nikola Tesla and futher developed by Otis T. Carr. It is meant to be made out of Iron filled with mercury and have copper windings. 6 fins on the outside to get the Utron spinning by the air as they go around in a marrygoround :) This version has a spherical container to be filled with Mercury. This model requires very precise printing.