I just bought a new arf trainer off ebay. the plane looks great the instruction weren't the best but i've built a few arf trainers so it wasn't that hard to put together. but saying that there was no seting for high or low setting for the throws so i have no idea how to set them .this is a semictric wing{ pardon the spelling} this is a china made plane . do i just center the servo and fly that was or use a plane that is about the same and use them.