Hi guys, I've just come up with a way around the problem with ELSA. Take a look at http://www.DeclarePeace.org.uk/elsa/buoyeng.htm (http://www.declarepeace.org.uk/elsa/buoyeng.htm) and let me have your comments.
ELSA discussion is at http://www.overunity.com/index.php/topic,570.0.html (http://www.overunity.com/index.php/topic,570.0.html)