Ann: Drill Update Reef Extensions Confirmed McNally's RemainsOpen, page-192

As you would know aurifice I have only been down to level 9 and on the several occasions I have been in MS I have only seen limited stacking. I do understand that the deeper you go the more there would be. One thing I find it hard to believe that old timers would have recoveries anywhere near as good as the new Gekko plant AUL has on site.
i believe security at MS is paramount with procedures in place to minimize any theft.