I second that. a former employer showed me how to nib off the toe and heal on the concave side first then make your final passes. Or, I've see him use the convex side and holding equal pressure on either side of the board, starting with creating a flat in the middle and gradually running more and more of the the middle until you've reached the toe and heel then making your final passes. before getting my 8 inch jointer, I used to have to have everything straightline ripped,...not any more thanks to the jointer and watching my boss....