Build a Tapering Jig

By Chris Baylor, About.com Guide

In the next step of these tapering jig plans, you'll need to cut a slot in the spreader bracket.

Using a pencil and straight edge, draw a line from the top edge of the center hole in the bracket to the top edge of the hole farthest away (on the opposite edge of the bracket). Then draw a parallel line between the bottom edges of these two holes.

Finally, using your jigsaw, cut along these two lines to create the slot in the tapering jig spreader bracket.