[img]/forums/images/icons/tongue.gif[/img] Pat, whenever I read your posts it reawakens my technical past. [img]/forums/images/icons/smile.gif[/img] IN FACT, your posts have been a huge help in jump-starting some long-dormant areas of technical expertise and THAT has helped me transition into substitute teaching. These kids nowadays are SMART;...... those that are paying attention that is.......so I have had to really push on my brain to teach advanced math and so forth. Thanks for the occasional shot of 180-Proof Chemo-Physo-Hydro-Engineer'n. [img]/forums/images/icons/smile.gif[/img]