i have sv27r with ul-1 motor/esc. i was running an x440/2. it got on a plane really fast... but i sold it now im running a grim 40/52/3... it cavitates alot before getting on a plane... i kinda liked the 2 blade prop more. theres so many threads with different suggestions i dunno what the hell to buy. i tried my old stock proboat 1.6/2.5 prop. not bad but maybe too much pitch for this motor? i cant decide between grim 42/55 - x440/3 - x442/2 - x640 - x642 just lost in a world of props and i dont have the money to buy all of em and test, plus i have no gps so who knows what my speeds are..... so confused im looking to get close to 50 and keep things relatively cool.... please help... i know a few of you have made suggestions already, im sorry to ask again but i just dont know whats best for this hull/motor/esc combo