And using processes like that, not only the upper leg but some other things, we've gotten our robots to go from big, behemoth, bulky, slow, bad robots -- that one on the right, weighing almost 400 pounds -- down to the one in the middle which was just in the video, weighs about 190 pounds, just a little bit more than me, and we have a new one, which is working but I'm not going to show it to you yet, on the left, which weighs just 165 pounds, with all the same strength and capabilities.