If it is so evil why run it in your car or motorcycle and never give it a second thought, your hoses or other components a second thought? Most of the US runs on it. The Rotax engine is motorcycle engine compared to a Cont. or Lycoming which is actually old technology.
Experts aren't always expert and rarely do real research. For the most part the experience with ethanol is in the owners that use it world wide. If it were evil we would have planes constantly falling out of the sky. The majority of the guys that have had problems and certainly there have been a few is with poor components (i.e. incompatible fuel tanks, poor hose choices or other components and contaminated fuel) For instance almost the entire US fleet of Flight Design's use 91 oct with ethanol. Yes there some that use 100LL and a few who can find 91 oct without ethanol. They have had zero problems. Your RV12's use ethanol and I have 5 that come to my shop. Many other LSA and experimental use fuel with ethanol. Experts may make things look good on paper, but sometimes real world experience trumps paperwork. Real world experience from around the globe shows that many hype the woes of ethanol with suspicions or unproven speculation. If the experts think 10% is evil and kills planes what would they think of the South Americans that use 23% and have no issues. I did a demo once and poured a glass of water in a fuel tank with 91 oct and ethanol. (I'm a retired HazMat tech from the fire department) No what happened? Nothing. It still ran, maybe not as BTU efficient as if it were pure fuel, but it ran just fine. Now do you want all that water in there, absolutely not because it can do other things, but to suck in that much water through the tiny fuel cap vent hole that is out gassing to start with would take years.
I maintain and maintenance at least 30+ LSA a year and all use 91 oct with ethanol except maybe 5-6 that use 100LL and not because they want to.
Hearsay of the ethanol evils as totally different from actual and real in use proof.
I hear hearsay 2-3 times a week, but have never seen any in your hand real life proof and some thing people blame on ethanol wasn't ethanol caused at all. I have been using ethanol laced fuel in my planes and a helicopter for 12 years and all the Rotax LSA at my field (KRYN) all use 91 oct with ethanol.