Yeah, the variance as I mentioned in GT's thread is between 70% and 85%. This is FAR too much variance. We need the ability to change the map ourselves at any time, and we need to KNOW the percentage when we fill up.
Hell, what if only half the servo's tank of E85 has been used when the truck arrives to fill it up with E70....then we will be filling up with ~E77.5, right? What if there was more or less of the previous fuel in there when we fill...we will never know the actual percentage coming out of the pump. The closest we'll get, is knowing what the tanks were filled with last.
This will not work for us.