When you make your template for the router, bend a pc of glass or a metal yardstick around the curves, it will show flat spots and humps that will be in the bow limbs . Easier to get em out of 1/4" stuff than 1.75" or 2" on the form.
A lot of these I've found I couldn't see or feel without bending something around the template.
The router makes the form face perfectly square to the side too, if you take your time and hold it tight down on the template.
Good luck, and HAVE FUN!! :D