I just finished one with a Saito 82 GK. A word of advice. The recommended CG at 5 1/4" from the leading edge is too nose heavy. The plane flies like a brick at the recommended CG. Make the plane more tail heavy by moving the battery and/or RX back in the wing. Move the engine in the mount to make it more tail heavy. I set mine with the RX and battery towards the back of the wing and then installed the engine to the recommended CG and it flew like crap. I added some tail weight to get it more tail heavy and it flew with the tail down in upright level flight and when rolled inverted the nose went to the ground. I had to keep down elevator to get it to fly level inverted. I have now moved the engine back in the mount but haven't had a chance to fly it. I know this should help because I have a 1 oz. spinner nut that I removed and it flew better. That is why I moved the engine back towards the tail.
I attached the tail wheel to the rudder to make it steerable. I glued a piece of plastic tubing to the bottom of the rudder and inserted the tail wheel wire in the tube. Easy to remove the tail wheel assembly if it needs replaced.
There are three guys that fly the same plane with standard Futaba servos without any trouble at all.
I'm flying mine with a 14x4 Zinger prop.