I'll second what Dave suggested....I do that trick myself, and I think it was Dave that told me about it a long time ago?

It also works somewhat with tweaking one elevator half. As long as pushes and pulls stay clean, you're all set.

I'f you're carrying 20% mix, obviously it isn't the answer. But if it's a small number and it's the only mix you have, try it. I'm a believer [8D]

-M