Need Help. Can't resurface my spoilboard

The short of it, you would want a spoil board (waste board) on top of the Shapeoko’s base board/plate. As you will want to continuously be able to surface the board after a given length of time (jobs) and replacing the base board/plate is much harder compared to one on top of it. I think the minimal thickness waste board you would want is 3/4"

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