What irritates me about this whole project is the EPA & FAA have in essence mandated at drop in replacement for 100LL. Why then should the GA fleet have to pay for an STC? The Feds (taxpayers) have dumped untold millions into this and we’d still have to pay for an STC? GAMI and others did the work because the Feds demanded it. The “winner” should get paid a lump sum by the Feds for the R&D and be done with it. That puts it on equal footing as access is to 100LL.