Here is another process for a "half template": start from a straight edge of your material and mark a center point. This point will become the center of your shape (blank). Now decide on the finished center width of the shape, divide by 2 and mark that distance at 90 degrees out from the center point (a typical long board width will be 22" to 23"). The nose and tail points are done the same. Mark points 12" in from the nose and tail then another at the width you want them to be (typically tail 14" and nose 17").
Insert a finishing nail at each of these "main" points and bend the molding to the inside of the nails. Now trace the outside curve. The tail and nose lines can be done freehand and more points and nails may be added along the curve to change the shape or modify the template dimensions.
Now rough out the template with the mat knife or saber saw and true up the curve with the shureform. A nice final edge can be made by sanding with 100 grit on a long (14") block.
|Note: with some thinking you can flop the front half and combine with the back half along the center line and create a "spin template". This will save on material and storage space.|