RE: First 3D Plane (servo help)
IMHO You COULD get by with 3004s on everything but the rudder. For KE you will definitely need some more grunt there.
However digitals with better torque are now not expensive and that is what I would reccomend.
Futaba S3152 will do [ I am using these on a 3D profile with a 120 ] or even cheaper are Spectrum. $90 to $120 for 4 ?