That idea has been around for almost two decades. There is even a company that has them pre-printed.
http://www.ebay.com/itm/BORDERS-MADE...3D171723190117
When I enlarge or shrink a quilting stencil, I use tracing paper to pin to the quilt. You can do multiple layers by letting your machine without thread following the pattern making little holes in the tracing paper that you can follow. Glad you found something that works for you.