I think I learned more in two hours last night than I have in the past five years. Tim had a way of explaining complex principles in a way that even I could understand...and that's saying a lot :) Thanks for inviting him! Growing old is inevitable; growing up is optional. _______________________________________________ GSAS-Member mailing list GSAS-Member@thekrib.com http://lists.thekrib.com/mailman/listinfo/gsas-member