John; Anything can happen in any casino vault as long as someone on the inside is willing to take the risk. It's no secret that some premium players are afforded some liberties and perks that us common peons can only dream about.

Don't know anything about grind numbers. It's something the casinos in A.C. don't disclose. Hell, they don't even like to tell us when they are ISSUING a chip.... much less destroying them! <g>