The secret to precise, repeatable crosscuts on the tablesaw, the crosscut sled has always been a bit tricky to make. For starters, you need the runners to fit the miter slots securely, and then you need to attach the rear fence perfectly square to the blade. Neither technique is a piece of cake, but Alan Turner's sled design makes both of them accessible. He assembles the base in two pieces, and then joins them for a perfect fit in the miter slots without any slop or wiggle room. He also found a way to easily fine-tune the angle of the rear fence during glue-up so that it is perfectly square to the blade and stays that way.

From Fine Woodworking #227