None-the-less, I'm not going to alter my opinion that the OP idea was a good one. It demonstrates a good understanding of scientific principles and it's not an idea I would have thought of.
Many thanks, don't alter your opinion , it's extremely rare to see someone praising me in a scientific forum, actually this is the first time, hehe. Not many people post in a science forum, I'd love to see more posters, like for cooking, painting, sport, art forums, but it's difficult. I am a layman here.