CG functions great at about 37% percent for great 3D and knife-edge is OK too. At 33-34% it flies very smoothly and still 3Ds greatly, but knife-edge is not good. I cannot tell you exactly where mine is, but probably between 37-40%. When the motor is cut, it will fall in a deep stall unless down elevator is given. That is how rear my CG is. No problems with stability.

Full rate:

Elevators- 50/55 degrees w/85% expo

Rudder- 50/55 degrees w/50% expo

Ailerons- 45 degrees w/85% expo

Low rate-Elevators 30 degrees w/40% expo

Rudder- 45 degrees w/30% expo

Ailerons-30 degrees w/40% expo

I have ailerons mixed with elevators for flaperon/spoileron. Down elevator/up flaps and up elevator/down flap. I do not know exactly what the ratios are but start small and work you way to larger amounts of flaperon/spoileron.

With that mixing and those throws, I can do just about everything with wow factor. Micro loops, waterfalls to the deck, hyper circles into flat ascending spins, flat spins upright and inverted, knife-edge spins, knife-edge weird stuff (it will not knife-edge loop), snap turn-abouts, walls, parachutes...

I also use the YS63 with a 14-4W APC. It's a little too long and the airplane cannot be landed with the motor running or take off from the ground with the stock landing gear set-up. Bigger wheels or a gear change or a 13-4w are necessary if you want to ROG (roll off ground).

Happy flying and many calm days,
Mark