It think it's a matter of what I said earlier: "If you can get both ends of the spectrum, that's probably a hint that the tweaking needs to be a little more gentle. I suspect we tend toward caricature: we know certain tendencies characterize youth and age respectively, and then we overdo those tendencies." You're largely working with the right parameters, just need to be a little more gentle. But you're very close, IMO, especially if you're aiming for a young teen.

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