If you want to produce perfect seams in Solid Surface you absolutly have to have this Mirror Seam Template Kit. Once you watch the video you will see the advantage to producing seams with this setup
The two pieces to be seamed are brought together. A spacer is placed bewteen the sheets and the template is placed over he spacer. Four clamps (supplied) lock the template in place. A template guide and a spiral bit are fitted to your router. The spacer if removed and the router is placed inthe template. As the router runs down the template it cuts off 1/16" from each side of the sheets producing a mirror seam that mates perfectly.
The kit comes with a template long enough to cut 39", a spiral bit, a spacer and 4 clamps.