Hi mekanik,

Thank you for you msg. I can't make one myself. However, I can tell what you are telling me is important although I am sorry I do not understand what you mean by "tell them to reproduce the radius were the dia meets the square" I could learn this I think it could be doing. You say if that is done with a sharp tool it will produce a stress raiser, so is there a time when a blunt tool is better?

Many thanks for the help

Suesi