You are going to make the plane more tail heavy. Any control input affecting pitch is going to make a difference from now on. In straight flight your rudder will be used to yaw I dont think you will see a huge difference other than maybe the plane being more sensitve to the elevator when it slows. However on knife edge or another 3D manuver I believe you will see a notable difference. As the plane is now tail heavy any control input to pitch weather its a knofe edge or elvator movment will heighten the controls intensity. Hope this helps. Be carful as tail heavy planes are very very thouchy and a 60 size Giles can be a handful. I had a YA Giles 300 with a Saito 100 in it and it was very snappy when it was tail heavy.