Reply To: How to prevent bowing when preparing a board?

Mark the four edges first.
Plane down to the mark all the way around. This leaves a hump in the middle
Then plane down to the mark going slow so as not to over shoot. Mark the surface with pencil lines and stop when they dissapear and remark.
Set the plane shallow at first til you see how much you remove.
Until i set it find i overshot a lot dont spare the pencil lead. Its your friend