I'm glad I found out about this little invention on here. Every time I work on a bow I get "upset, nervious, confused, UNTIL I start with the gizmo. It gives me a point to work on rather than eyeballing the tiller which I have to do until I can bend the bow enough to use it. When I see the pencil lines I know what to do with the limb. Then I can relax and let the tiller come into shape. Thanks!