Well if you really want to drive down the cost, the best thing to do would be to mass produce the actuators for the purpose. The actuators MIT used aren't reall

Well if you really want to drive down the cost, the best thing to do would be to mass produce the actuators for the purpose. The actuators MIT used aren't really intended as actuators, they're some weird part for moving knobs around on high end audio equipment. Now as it turns out, there really are linear actuators that cost about $1 per actuator, they're just tiny: http://www.alibaba.com/product-detail/Goteck-1-5g-Super-Micro-Analog_60006747818.html http://www.alibaba.com/product-detail/Goteck-1-5g-Super-Micr...