lol, actually, i did try this ages ago when tinkering with standard JR servos and i blew the boards in them. I ened up U-tacking some round servo horns to the servo motor shafts 1:1. the whole little robot weighed around 80g, it was damn fast, uncontrollable, did sweet assed Full Body Spins and looked cool. But if it was a combat robot, it would get pushed around a fair bit. If you made it a Gold Digger style thwack bot, you might have a chance