My machine has a three inch max depth of cut. I have some thoughts about the Z axis carriage and how the spindle motor is mounted to it. Theory, if the top of my table is at max depth, three inches from the Z axis carriage then the max depth is reduced by the thickness of the spoil board, correct?, does this make sense so far. Then if any of this is true then I should mount my permanent table surface at three inches plus whatever thickness I choose to use as a spoil board. Making the thickness of the spoil board my default thickness. Any comments, I have pondered this for a long time now. Is it rational????