Re: "Internal" and "External"
Chris, I read your posts and it looks to me like you're arguing that there's no difference between a frog and a duck. I'm sitting here staring at the duck and you're saying, "No, no, that's a frog. A fuzzy frog."
I've done sports. I've done weightlifting. I've done Aikido in a few different traditions. I've done IS, at least the early steps of it. The duck is a duck. Get over it.
Look back at my description of the encounter with Imaizumi Sensei. The whole point is that without organizing and moving the body differently, what he's doing can't be duplicated. Ditto a half-dozen other people I know.
May I suggest the worst possible use of a forum on internal training is to debate whether it exists? We should be past that.