Does anyone have any hints on achieving the perfect half mitered lap joint? I have used two versions from Woodsmith and come along fine until the mitered cuts are made to join the pieces together. They are lined up looking from the rear of the tablesaw even with the corner, looks simple but I can't get a perfect cut each time. I am using a block with hopes of each cut being the same, occasionally one or two will cut too far up into the shoulder distroying my perfect cut. Comments welcomed.