I have proposed using special election coins. You put your coins in your candidate's slot and the votes are weighed. Special alloys for each election and a coin comparator to kick out counterfeits. Keep the design and the alloys under lock and key until just before the election. It would be impossible to make the dies, alloys, and stamp the coins in time. Bureau of engraving and printing could do the job in a couple weeks. Collectors would pay for the coins after the election to offset the costs.