Hi Stugots, Thanks for your kind offer. I'm running a bit late here today, and about to head off to the bowling club for the day, another of my addictions, bowls that is. If you wish to send me an email during the day, I'll send you my file with some explanatory notes of what I do and trying to do. By the way I am using Excel 2010.

Thanks again, Paul

pauls at tsn.cc