I see you've posted this on the PBO forum on YBW as well - and I was interested to read the replies.
This is one of these devices we would love to believe in, but there are too many questions and not enough answers. The YBW forums are very big, with a lot of very experienced contributors - if no-one there has ever seen one of thse things, and if no-one has ever met anyone who has one, then we must doubt its existence.
Nick