Ian, your four boards should be like this shape. The Trend VariJig shown has clamps that fit into the bottom of the guide strips. You can use double sided carpet tape like John suggested or you can put a board underneath and fasten your guide strips down with brads, finish nails or even screws. They need to be flush so your router does not catch on them.
If you fasten a small piece of wood under one edge of your router with double sided carpet tape your router will be easier to use since it will be supported on both sides. If you look real close you will see one under the left side of the router.
"Living in the D" (this means Detroit!)
"It's fine to disagree with other members as long as you respect their opinions"
Last edited by Mike; 08-09-2015 at 05:21 PM.