I think pursuit of perfection a much better description, one which everyone should follow. Check out the definition, it's ugly. One of the most retained and used tid bits of info I gained at Fox Maple was math, and to trust the math. That is if you can find all the triangles, leave one out and your....left with a redo. .7071 and the companions are used very much. Other people keep coming up with these construction calulators, which are like sugar, but I like to know where the numbers are coming from. How about a nice slick, I use my slick everywhere, hardly touch a chisel. Even with resawn stock mill rule laggs, Square rule, rules. Tim