A quick do it yourself router circle jig made from two steel rods, two electrical grounding bars and a bolt. Used it to cut all of the round recycled Corian tops and it worked very well. Make sure to wear a respirator when routing plastics as the particles are very bad.
Display Unit built from two recycled warehouse carts, threaded rod, conduit, wood and misc. Main table top is a warehouse cart and the shelf is built from a cart that I cut in half. The legs are leftover wood from a never finished project and threaded rods with conduit sleeves serve as horizontal support.