I made this Star Trek Badge&Ship for the RingDing-System.
The Ring-Ding system is a ring with interchangeable discs, available at many stores here in germany.
It's a simplified Enterprise and the communicator badge.
Beam me up!
Print the "chubby" Topper and Discs (!!!!UPDATE: Print the thicker_and_for_m2dot5_deeper1mm.stl ship, it's made for M2.5 nuts and is deeper), paint Golden or chrome and Grey-Silver.
Insert/glue a M2 nut into the ship-topper, done.