The early A's weren't too bad, although they had a bit of a nose up hover attitude, but the Arriel installation puts the engine mass nearly a foot further aft than the C30's. The engine bay cover also shifts the CG further aft: the early C30 engine bay cover was a one man operation, but the extra weight of the Arriel bay cover made it into a two man job to open/close.
The first A+ I flew was so tail heavy, we had to fill the nose flotation bag bays with lead weight to bring the CG into the approved range
