Last one I built like this was from scratch and had 2" more span and 1.5" more chord I believe. Might have been 2" more chord. Anyway it had the 46 in it for a while til I upgraded to a K&B 61 very little weight penalty....just less flight time on the tank already installed
I've had a few that scared me for different reasons. 40 size Corsair with a 50 Hyper heli engine and prop hub from I think a 61 motor. The RPMs on that was scary and it screamed around the field. Due to the helicopter carb it had basically idle or wide open.