I completely understand locating the tank over the CG, that really wasn't the point I was trying to make, Just pointing out how many people have had to relocate equipment to get the proper CG.
Mike
ORIGINAL: glowplugboy
Having the tank over the CG changes the way the airframe will balance. In flight, a tank located on the CG will eliminate initial nose heaviness and a gradually aft shifting CG as the fuel load lightens. Keeps the airplane neutral from take off to landing CG-wise.