TDV- good question. It could be tampered with but I didn't say that, you alluded to it. I want to have faith in the system but lets face it, the casinos control every aspect of the game except pulling money out of your wallet. We can choose how we play, how we bet, where we bet, when we bet. We can't control the actually table surface or use our own die but we can still shoot the bones as we see fit as long as we hit the table then the back wall and don't slide them. That is what I know I can control and that in my opinion is enough! That is my only advantage. The caliper on the other hand, is out of my control but I think seeing it used on a consistent basis prior to putting the die on the table, could be interesting or maybe not.