RE: Bates 106
I would go DLE 30s, more power than a G-38 with less weight. I have flown my Dad's NZ B-25 on G-23s at 35 pounds and it was more than enough power for scale, yet fun flying. It did maintain on one engine, and even lived after losing an engine on takeoff. More power would have probably rolled it into the ground before realizing what happened.