Thanks LunaSea, Since I don't know where to find a new Quadra Q45, I'm leaning toward the Zenoah G-38, With all the extra sheeting on the wing and tail feathers, f-1 to f-2 Spruce stringers anddowels,the rabbited wing mounting blocks and Solotex Fabric covering I'mconfident the air frame is worthy. My first of three flights the heavy tail caught me off guard, it kind of hover'd gently into a tree... no damage