Just acquired a E Neptuno with scorpion motor and ice2 80. Don't have the time (comp is 2 weeks away) and the dough to experiment on which prop to use for this set up. Hoping somebody could help me decide with the same set up or at least the same motor. I'm thinking falcon V2 21x14 or 20.5x14.5 but heard that with these diameter I'd be asking too much from the scorpion motor. Your inputs will be highly appreciated since Im also newbie to electric flight.