Wow, you people are interesting. 300 meters over the head? School project? Rather than try to build imaginay profiles of the people posting, you could simply answer the questions that are asked. This forum should be a place for people to share ideas and information, not a place for a few to try to build their own egos. I to have developed and image of what kind of people some of you are, but no need spell it out here. I have heard this forum has a reputation for this kind of thing. I see it is well deserved. By the way, I've been out of school nearly 20 years. Good thing is, I actually did get some helpful information from Nigel out of all this.