Place the power FC in the bin and buy a ECU that can accept an Ethanol Content Sensor. Most if not all decent ECU's will do it.
ECU alone, it cost roughly $700 for the hardware (lines, sensor, display, fittings). You then have the dyno time (which is where the money is). My own car, I think we had 7 different maps which and it adjusted to suit. No laptops, no plugging this in and checking that, just fill and go!
We started off with a E85 map and kept adding petrol. Every 15% of ethanol we would save a map.