Combatpigg - although way off topic, I heard the DZ from Y.S. is the mother of all engines... when I get a garage, I'm gonna get me one of those and find a plane to put it in! But in terms of pattern planes, I wouldn't get another Zen. Although the kit is good and all, I think the weight of retracts is not welcomed in a pattern plane. I'd rather get one with fixed gear. The .63... well, nothing to say about that! It's a sweet sweet engine