anyway, since you are looking for a new plane with a new engine, go for the bigger size, like a 90. Also, if you don't mind spending some money, I would go for a four-stroke. All new designs that come out are made for YS-90/110. This means they already have a build-in engine mount which is designed for a inverted engine. You either have to strip this, or live with constant flooding of your engine, making that first start a big issue. If I would start fresh, I would go for a Saito 125. Also, I really loved the flying of my Fliton Infinity. It is no longer on the market, but you can order it directly from http://enjoyhobbies.net/index.php?ma...products_id=16
but there are many more around.