Pat, you have real talent as evidenced by how exact your three pawns are. When I did this, even after much practice, I was never successful in getting exact repeatability the way you have!
MAKE: Void your warranty, violate a user agreement, fry a circuit, blow a fuse, poke an eye out... www.makezine.com
"One should respect public opinion insofar as is necessary to avoid starvation and keep out of prison, but anything that goes beyond this is voluntary submission to an unnecessary tyrany, and is likely to interfere with happiness in all kinds of ways."
I have put together a very humble blog to describe the steps and show you the progression of the project. You can find it at postscriptumdesign.wordpress.com
Here are some supplies and tools we find essential in our everyday work around the shop. We may receive a commission from sales referred by our links; however, we have carefully selected these products for their usefulness and quality.