Bill Tindall, E.Tn.
The drawing, executed with my marginal drawing skills, was meant to record the variables that have measurements shown, that repeat no matter what I am making (unless it is something small). You will have to take it on faith that I can lay out symmetrical dovetails using lay out tools better than I can draw the intention. You can see from the drawing why I still rely on a divider to locate pin centers rather than draw them on the board with just a pencil