Toofuzzy thank you for your guidance I read the book. I also visited the web site for aim-users. That site was very informative. I also found on the site an Aim calculator and spread sheet of your invention. Thank you for referring me there. I'll use them well. Mr. Lichello seems like an interesting man. In general is there a biography I can read about him? I'll keep you posted of my progress respectfully Neko