Also, talking about electronics, pure tin solder is nothing but a time bomb. The tin grows wiskers that can easily cause shorts between close "wires" (within the board). Getting the lead out of solder is very counter productive, and causes built in absolence. Naturally, the consumer electronic folks love that. I have an old model IBM PC here that is still going strong after 12 years and not even a hint of a hiccup. Because of its slower speed and extreme reliability, I use it as my Ethernet server exclusively. It was built before that mandate to get rid of the lead. ... felix