Locate the position of the bridge, using a straight edge establish the center of the bridge on the top. The center of the bridge is controlled by the center of the fingerboard. Mark the center of the fingerboard at the nut and the bottom of the fingerboard at the sound hole. Now take the straight edge and mark the center of the bridge at the point of the bridge saddle on the top. Make this mark lightly. Now with your bridge template lightly mark the area of the bridge. Remember to move, the template towards the fingerboard so that the bridge saddle point meets the saddle point of your scale template. Mark the corners of the template lightly.