Thanks Michael, i have figured out your way, and yes it had to be done by eye, but at least it works. It's not a clients drawing, it's just one plucked off the net for what i thought would be simple a simple task for MoI, which it as long as you have all the data to translate, is there any way you could add something like a lathe option/tool. It would certainly come in handy here at times.

Martin