So, I went with the Evo 15cc. I have never been more disappointed in an engine. It barely had enough power to climb out. Then I had numerous dead sticks and came close to losing the plane. I sent the engine back to horizon and they said the rings were burnt up. They sent me a brand new engine which was very good of them. The problem was that I had the same problems with the new engine. I finally decided to put a dle20 in the plane before I lost it. Dle 20 runs great and pulls the airplane beautifully. It was a bit of a challenge fitting it in the plane but not that bad. Now I have an Evo 15cc for sale! lol!