I see what you mean...and I am familiar with the Saito 1.50...got one in my H9 Cessna 182. And, I have a Saito 1.25 in mt H9 Funtana & has good vertical.
For the guy asking about putting a G38 in this plane---I don't even think that's possible. G26...possibly, but will lack vertical power. Light and powerful is the key. Yes, I am big into 3D and I'm considering getting this plane. Already have the Twist 60 and love it.