I got a YS110 and I am in love with YS engines, I am thinking of getting the YS140 or the YS160, depite costing about as much as a DA50 I am pretty keen on it. Just to ask ... what sort of performance will the YS160 and YS140 give? It would be great if you can let me know what prop size at what RPM ... estimates will be fine. Thanks a lot!!!