Yes Phil, I am laughing, now. I know what you mean. I have been told on many occasions that I "should not concern my pretty little head with all that technical stuff" (real tech term). But, as a researcher, I want to know. And yes math and science (especially physics/chemistry) were my favorite subjects. My son could explain gravity at 6 and my 9 year old grandson has been known to correct an astronomer at a planetarium show. I guess I've passed it on. Oh yes, my daughter can explain many things about cancer to you too (unfortunately from personal experience). I look forward to you finding the envelope. don't forget how to laugh Marling