Bill, I listen to you like a Obiwan listens to Qui-Gon Jin.
I like your stuff, the only issue is that there are too many important pieces of info you delivered but it's not easy to find them all, in a single place.
For me, if you say something about slingshots, I take it as a truth until I'm such an expert that I'll be able to refute it if needed.
Just wanted to thank you.