I have the GP Ryan STA. I'm using an OS 91FS. Flies very scale like, with big round loops. It also does some of the nicest slow rolls you could ask for, you just have to feed a little up and rudder when doing them. The plane is a ***** cat to fly. It doesn't have unlimited vertical but neither did the real plane. I ditched the wire struts and installed the Robart Struts, which makes ground handling a breeze. In fact, I love doing touch and go's with it. I land the plane with just a tick above idle as I past the threshold of the runway I touch down and then keep the tail up until I reach the other end of the runway where I add a little juice and she is airborne, ready to do it again. Most of my flying is at 1/2 throttle unless I want to do a wing over then I use full power into the climb. The STA on a clear blue sky stands out and looks really nice. I wish GP didn’t discontinue the plane.