Three digit electromechanical Counter / Register

This is a 3-digit, base-10 register for an electromechanical computer I'm working on. It is stepper-driven, and works like a 3-digit counter, counting from 000-999 before rolling over. When all three digit wheels read '0-0-0', 3 reed switches will close and a circuit will be completed to detect the condition. --- Imported from Thingiverse: https://www.thingiverse.com/thing:15346 Original creator: chris