Haven't flown mine yet.. but I have a Moki 1.8 in mine. Couldn't afford a 50cc engine. The Moki 1.8 was in my GP Christen Eagle (which flew it nicely.. and pretty scale with scale-like aerobatic performance), so I bought a Brillelli 46 for the Eagle, and pulled the Moki out and put it in the Ulti

Will post up how it handles once it's airborn