...u r trying to over simplify a complex issue with different variables...e.g. raw submissions vs crossovers, "market vs technical", ms/au vs au/ms, au55 vs au58, not to mention the issues regarding toning etc...moral is dont put all ur easter eggs in one basket...just to illustrate one of ur concerns, ms to au...submitter has option of agreeing to crossover with reduction of grade or refusing reduction n return of coin, so many diff reasons to go both ways depending on what the coin is...i presently have coins for crossover submitted both ways, some im hoping for the reduction, some it would be counter productive...not a one size fits all scenario....