maiden my yak 54 pro this weekend. this plane flys real good, harriers are good could be a little better when i get it completley trimed out , torque rolls real nice. walls are a little slow but moving the c/g back will fix it. my c/g is behind the wing tube. and it is still nose heavy.moved my battery back and will give it a try when the snow melts of the runway. also elevators are real good and solid the plane just falls straight down no wing rock at all. so this will be a great plane once i get it set up. os 91fx turning apc 15x6 at 10300 rpm with fast throttle response running mousse can muffler. will pull out of hover with athority. you guys are going to like this one.