Get a different place to sharpen your skates, that is Blademaster's attempt to copy the FBV. It doesn't require a different machine, just a different dressing tool and the correct spinners. Blademaster lists the X6 as 3/8 - 1/2, X7 as 1/2-3/4 and X8 as 3/4-1". That's a pretty wide range on all of them.