sometin extra does fine. I don't think it needs more rudder area as it does less fin area; I made a counterbalanced rudder on one to get it to knife edge better, mostly to reduce fin area; I think the fin was keeping the nose from turning up enough to maintain knife edge, except when I entered slow, rolled it on it's side, and flew it high alpha. It had good rudder in hover, especially after the canopy blew off (gotta love a.r.f. planes). was flying it on saito 72, 13-6 mas scimitar (low pitch is for 2 strokes) 15% sig fuel. am now flying sig ultimate, they make good stuff.