I agree with dparker about the carb, APD, Prosystems, Rupert, just to name a few. We have run alcohol for years and have never had much of a corrosion problem, he is right we are used to everything associated with it. We never drain our systems, never have milking issues, etc... I believe methanol is more consistent but once in a while humidity can through you a curve if you get a big DA swing, gas is more predictable with weather change. We do run Klotz top end lube. Just my biased opinion on it though.
Curtis
P.S. we have run APD, now running Rupert, Demon, and Toilet.