i see many answers all very good, yes you have to use those cheaters, everyone does i have found when cutting and polishing a lot of people do so swinging the stone from center to side. if you make sure your head and mast is aimed straight to the center of the cutting wheel and finish you cuts straight at the center of the lap you rill have less to cheat. a lot of the laps are a bit higher in center than on the edge even though their machine to not be, this causes an anglure cut on my ultra tec is rare that i have to cheat the table. mike zinski