now that i think about it, if you can make the array of probes, you don't need any moving parts. vvvvvvvvvvv '',,',''''' ^^^^^^^^^^^ build two in opp

now that i think about it, if you can make the array of probes, you don't need any moving parts. vvvvvvvvvvv '',,',''''' ^^^^^^^^^^^ build two in opposition and pull up or down for each state. far far easier said than done i'm sure. :D