
So, if you aren't yawning yet, I'll share with you how I'm making the scrolls on the frame saw fairly identical.

He also shows his technique for ensuring identical scrolls on both sides of the violin. He punches tiny holes through a template, thus transferring the pattern to the workpiece. Then he connects the dots.

Something else that works when carving symmetrical shapes is to mark a center line on your workpiece. That way you can eyeball both sides as you carve, keeping them evenly matched.
The next post may or may not involve carving. Hard to say when it's a meandering right-brained noodle that's doing the writing.