My friend bought my an ultimate bipe kit for christmas,he thought it would look nice on floats. We don't have a field near by so we do all of our flying off of a near by lake. I have a GP super sportster on GP floats and it flys awesome. I posted this on the rc news group and the consensus was a forty size engine wouldn't be enough to fly it. Are these kits usually tail heavy requireing nose wieght to balance? Could I get away with a 60 size two stroke on it? I really don't want to deal with learning how to operate a four stoke motor. I was thinking of a piped Rossi 60 wieghing 21 ounces without exhaust system, any thoughts on this? Mike