[Jos] Applying ususal MOQ zealotry to the rounding problem I think you* > produce another kind of maths thats no bloody use to anyone By "you*" I mean "one" by which I mean "me". Please dont appologise I'm all for zealotry - in for a penny in for a pound. [Ron] Thanks for your support and finding the Topos theory, I do't feel so much like a raving lunatic.