I thought of sending Terry a PM, but posting here might give my proposal some support, especially if our friends think it's a good idea, and post up in the affirmative.
Terry will you consider making a instructional tape/video/CD showing how YOU use your chart? I don't think you'd need a professional production, and "home grown" would work for me, but I see a need, and would happily pay for whatever you could come up with. I'm very pleased with mine, and have read an re-read your very good manual; but still have doubts about correct usage.
I'm betting there are many other chart owners who agree that you should do this, and would be willing to buy such a product.
Merry Christmas ..best regards ...mike