What's puzzled me since the first time I saw this fellow is......why does he make it so obvious.....his hand....worn the same in every video of his.......white bandage that looks like it was put on by a Cub Scout.
Mark, that's not a bandage - it's an amputee sock, used to cover the stump under normal circumstances. In this instance, I believe he used it to cover the hook so the hook device would not damage the keyboard while playing.
Gary

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K+E=W (Knowledge Plus Experience = Wisdom.)