Gearball using Screws

Updated the design of skylarmt, using screws instead of plastic clips. Also reduced the size by 25% to make the ball about the size of a baseball.

Two sizes of screws are used: M3 x 25, and M3 x 12, and the eight parts of the ball have integral holes built in. The "heart" has holes about the right size to accept the screws without actually tapping the holes.

I printed the "heart" in PETG for strength, but since I also printed it with 100% infill it probably would work as PLA. The other parts are printed in PLA.