on tip i give is to find your source for E85 and stick with that source. or test your content often. i just bought a drum so that i'll have enough to last. also i take plenty with me to the track.. if you are going out of town and not sure you brought enough for the long weekend research available stations before you leave.
i was told about this website and even seen it in a post on this site. it offers alot of good info.
www.raceone85.comthe guy that did my carb has done many e85 setups around here if you'd like his number pm me.