The single longest pole in the BuckyBot tent is supplying the wee beastie with power.  Tethering sucks.  Optical power transmission is wastefull.  We are open to resonate power transmission a la Tesla ...  I'm also making a micro-miniature extruder that should be much more energy-efficient than what is current (excuse the pun -- but, then puns are inexcusable, aren't they?).