Possibly 20 more mistakes that I'm aware of. Since receiving the spreadsheet from tclark I've been focused on NASI #'s, formulas and adv/dec #'s. Are you using the Meikka formula? Also if your adv/dec #'s are coming from the DP link we need to compare. On another note-everyone who has contributed deserves a lot of praise. Also- if the name of the program is still open here's a suggestion. "CSCS" comes from "CS" group "C"ombined "S"ystem. I'd like to take credit for the name but in clear conscious one of the regulars already had it in one of their posts. They just didn't christin it that way.