Thanks to all for your support.Mark I playedwith some 1440 props with different mods and the best performance was achived with those numbers.The V937/3 reduced to 35mm is very fast as the prather 215 reduced to 37mm and cup 3,3 ..This is my very first experience with this motor and what I can say is WOW.......let's see what's happen next week at trials.