Try this link

http://www.rcuniverse.com/forum/m_10...tm.htm#1062376

I made these changes and they are easy and well worth it!! Mine will knife edge all day at 1/2 throttle and 1/2 rudder deflection. It does FLAT flat spins and excellent Lomcevaks with the increased elevator surface. Install a pull-pull on the rudder (very easy) and use a high torque servo and you will be set. I also put 2 servos in the tail for the elevators and didnt have to add any weight at all..even with a Saito 1.20 in the nose