About training in US, he used harness with his jump practice except lutz. Japanese rinks lack harness, and he was sorry for it.
Provably, the practice using harness was effective for him.
A few days ago, I was watching a video clip on the Glacier web site that showed them working with a little girl in the harness. It's really very interesting the way they do it. In fact I once saw a video of Jason Brown training with it. If I can find the Glacier one, I'm going to post it. It's a great training thing!