Thanks tbuggle. But I'm sure if you look real close you will notice the pivot point on the lower front of the gripper is fixed in position to the diablo. That distance never changes. As the whole assembly moves back and forth they move together. The only thing that rocks is the gripper assembly about the pivot.
When you're dead you don't know you're dead. It's the same way when you're stupid.
Balance - 31.0 cm, Weight - 358 g, SW - 346 Kgcm^2