Heh. He faw down and go boom! That hybrid turning motion does seem to work best. The straight walk is boring and the first rotate made me dizzy to look at. Sure, the Masters have gravity control, but even if they can cancel a centrifugal effect it doesn't "read" very realistic as a motion. There is something wonderfully alien about that slow determined turning motion, though. And given the length of those thing's legs, they don't have to move very fast at all to outpace a running human. Seems the key is to find several "gaits" and mix between them, like most earthly creatures do. Wonder what a tripod gallop would look like? All three legs off the ground, right? More to the point, I'd love to see some almost too delicate movement, a lot of little shuffling of legs, as a tripod shifts position slightly to get directly on top of a target. This looks lovely. Background "look" is perfect -- I think people forget the kind of setting the stories had. Oh...have you considered having the dome rotate so as to remain forward as the legs circle? I'm thinking that dance movement here (tours chaînés déboulés) that's a spin but moving across the stage but with head facing (mostly) in same direction.