John,
I recall that someone here had written one. It might be in the database of tutorials. If you don't see one let me know and I'll write one up for you. I believe you will be shocked when you try it. The pen I posted the other night was at a 60* and this one is at a 45*. I think this weekend I'll go for a 30* with smaller strips if I have time.
Remember to e-mail me if you need an assist.