Well thanks for all the info . I'll have to have a think . I know the OS is a good reliable motor and with a Western tuned pipe will give a very good throttle response. I checked the price out at Steve web models resently and they've just increasd in price by £40 quid. The weak pound and import duty makes the Jett engine very expensive. For some reason I brought 3 of these planes. I'll post some pics and info once i get started.