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Jo Nathan,
Welcome to Pprune mate. I notice your a newcomer. You are probably reading these posts and perhaps taking it personally. Thinking that everyone is slamming you. Please, don't take it personally. Its because everyone has your interest at heart as well. Of course we are also thinking of ourselves, but that will in turn make it better for you newcomers. Its not directed towards you personally. Welcome to a dirty, tough industry that you really are going to look back on affectionately. We absolutely respect your enthusiasm, but research and make wise decisions. Cheers.