RE: More Important?
Sr. Falcon, I bet. Why have the fuel tank so low? On mine the hatch was hollowed out and the tank was quite a bit higher. I ran an OS 40 FP on it with no trouble, and without lowering the thrust line.
Alternatively, cut off the nose, side mount the engine, and make a balsa cowl.
Actually, I would try to preserve the thrust line just for the looks.
Jim