We've had a few emails noting that the article does not match the header.
Why this is so is a mystery to me and given the timelapse I'm not sure I can come up with a solution other than deleting the thread, which I do not want to do. It's a good thread, it's a good article. Only the header is incorrect.
If it can be sorted, it will be.
Ah..hang on...here's a thought.......
“Give a man a fire and he's warm for a day, but set fire to him and he's warm for the rest of his life.” Terry Pratchett