If you make a lot of toy cars and trucks and like to make your own wheels, Steve's wheel truing jig is a great idea to make consistently sized wheels. Steve uses the front face of the jig to keep the wheels consistent, however by doing this, the front face will wear very fast and you will have to replace the jig often. To make it a more permanent jig, make the base wide enough to add a miter slide on the bottom of the jig so it rides in the miter slot of the disk sander table. This way the the face of the jig will always stay the same. Make the base just slightly wider so when first installed in the miter slot you will sand the front face flat up against the sanding disk. Then drill the holes and add the dowels as indicated.