First of all, I would check the cg. is it at 10.5 from the leading edge? If it is, another way to check would be to fly inverted to see if it needs any down elevator input. If it climbs while inverted, then the plane is tail heavy. Then again, do you have the elevator set neutral for forward flight under power? If you have any excess elevator trim during level flight, when you are off power the elevator will be sensitive during landing as there is already some elevator input. I would do what Opjose recommended, that is to use spoilerons - about 1/8-1/4 inch up to control the angle of the nose during landing. It would help in slowing the plane for landing as well.