Some quick set-up tips:
1. Prop 13-6 or 14-4W.
2. CG@ 180mm from TRAILING edge.
3. For 3D set up max throws as per pan with generous negative expo, i.e. -80%.
4. For normal pattern flight set up Rudder at +/-30 deg(expo-35%), elevator at +/-15 deg (expo -18%), ailerons +/-10mm (expo -20%). Note that this is just a personal preference and it may vary from the "feel" you are looking for.

You will be amazed at what the plane can (and will!) do. It is a spining machine, blenders wonderfully and will elevator upright as well as inverted. The upright elevator IS stable as along as you set the throttle once and do not give short bursts (YS 63 has so much torque, it will destabilise the harrier if given short bursts).

Take care to build it straight (especially the elev. halves) and go out there, have fun, and throw all your other .40 sized planes to the bin...