Dr. Nitro, I couldn't agree more with your comments. I'd like to also add the following:

Do you think anybody can tell a noticeable difference between a fuel that contains 99.9% pure methanol or one that contains 99.5% pure methanol?

Do you think an engine will run noticeable better or different if the nitro is 99.95 pure or 99.7% pure?

I honestly can say I couldn't tell the difference and think that the best thing you can do to your engine is learn how to tune it and never run it lean.