Thanks Greg

,
well, I can't do anything about the dragging on top. I've noticed that too, but it's a matter of the object layering that's inherent in Flash. I'll see I can change the object layering on the fly.
You're right about the robot touching the stacks.... The simulator is pretty fine-tunable, but I didn't expect such fine simulation was needed. I'll see if I can add that.
And the errors on Page 2, i'm kind of laughing at myself for not changing those. I'll fix that.
Thanks ALOT! I'll issue a minor update in a few days.