Dmrcfly2,
I had an Ace Cloud Dancer 40 with an OS46FX and Thunder Tiger 40 size retracts. It was one of the nicest flying planes i've had (died in a spin due to the rudder horn screws ripping out of the ripping out of the backplate) and the retracts cleaned it up well. It was set up as per instructions for throws and c of g and was great. It did suffer from flutter as the aileron torque rods to the servo in the wing were quite sloppy from factory. Rather than pull it to bits i made two small servo trays and mounted a JR 331 in each wing direct to the aileron. No more flutter with independant aileron servo's. Here in Oz the ARF is around $230 AUS so they are quite pricey compared to other planes on the market. If they were a bit cheaper i'd have another in an instant. Hope this helps.