Fantastic project. We are very exited about the EASA STC... Did you consider the 5-blade MT propeller for the project? https://www.mt-propeller.com/en/entw/stcs/beech_ka90_2.htm https://www.mt-propeller.com/en/entw/stcs/cessna_206_3.htm Would provide some extra ground clearance and cooler starts. (and a fair amount of badassness) cheers Jakob