First, you spoke of clone. I’m not sure what you are talking about. The guy that I got it from bought it from Nitro Planes. Isn’t CMP Nitro Planes? I paid $225 for the plane (NIB) and a set of Century retracts at the AMA show here in Ontario, CA
Second, I was talking to the guy that I bought it from and went to his shop. He has been building for about 30 years and has done a lot of scratch builds. I have seen his work and it’s impeccable. He told me that weight is an issue in most war birds and that a 91 engine is more than enough power for this plane.
I don’t remember his exact words but he said that even the full scale war bird have a tendency to wobble (the tail pitching back and forth) a little and when you over power it, it increases the wobble and landing problems.
Has any one tried a 91 in this plane?

Shubova
[8D]