Plus I'm going to have trouble animating it as-is. It turns out running animal limbs must be quite flexible while mechanical parts aren't. :/
Should the second front leg be showing? I was playing with perspective and thought one leg made more sense, but the second leg will certainly show in the running animations.
I would add the fourth leg. Having a strange fourth leg show up when you're running would just look weird. Good thing it's the front leg that isn't shown, though