Welcome upsandups. Lurking is quite educational; I don't think enough people realize that. Every so often, I put myself on the welcome wagon committee and respond to Member Intro posts. That's why I have as many posts as I do. I've only asked a handful of questions myself because a little searching can go a long way on this forum and on the Internet. All that said, don't hesitate to ask questions when something's not clear. Sometimes it takes a few different explanations before your head can wrap around a concept.