Guys, I went flying with my yellow baby last weekend, and I can not repeat how happy I was to take Downthrodden's advice at heart to put a OS 61FX in my baby...she flies absolutely SUPER SUPER!! The wind caught the Twist when I was about to land, and pushed her towards the fence..I hit the throttle and she launched back up into the beautiful pale blue sky, avoiding an uncomfortable landing!! The power she has has saved me several times from errors I was about to make...It is a little bit of a puzzle to mount the O.S. 61FX..but boy,o,boy...it is worth any second and the joy you have with this spectacular engine it just amazing!! unlimited vertical flight...the engine just purrs like a kitten..fires up in a blink of an eye...I haven't touched the high speed needle in weeks!!It just hold it's tune like there is no tomorrow!! I think I am going to buy another Twist, just to have one on the shelve. This is my second plane and I would definitely recommend this plane to any flyer who is looking for a good second plane that will grow with you in the time to come!! The Twist is absolutely amazing and will always be part of my hobby!!....gheezzz...I sound like someone who's deeply in love don't I??...