I was assuming that you were securing the board with a single bolt through the middle. Without a piece of waste under the board, as the cutter finishes cutting the hole it will (a) score the rotary table and (b) cause the outside of the board to come loose and get torn by the cutter. Been there, done that.
Originally Posted by fotch
That's the manual rotary table; get the CNC rotary table and your dreams will be in TechniColor