XYZ Da Vinci 3D Printer filament cartridge counter resetter

One of my cartridges died a couple of days ago (printer was showing 0m left, where there was still filament in the cartridge), so I made this simple cartridge counter resetter that snaps at the bottom and resets the internal eeprom counter. It uses an Arduino Pro Mini PCB, spring-action push pins and a 3v button cell with some very basic code (originally written by Oliver@voltivo and updated with more features and bug fixes for version J by me). Please note -- someone is selling my design on eBa