Adding the flap servos is a snap. I have the ARF version, but I assume it should be outlined in your manual as well. Remove the wing and just to the left of the center line you will feel the cutout for the flap servo. I ironed down the covering around all the sides of the cutout then cut away the covering with a sharp x-acto. Remove the plastic static flap mount that sits between the wings. Remove the connecting rods from the flap arms. This you will have to put a 90 deg. bend in at the end which hooks into the servo arm .( it is well illustrated in the manual). Install the servo in the socket in the wing. Now, I connected the servo to the receiver and turned my radio on and found the neutral point of the servo. Now, I moved the servo arm forward using the TX . Disconnect servo from receiver. With the connecting linkage attached to the flaps, bring the z-bend of the connecting rods even with the hole in the servo arm . You will probably notice that the flaps are not only not flush with the wing, but not even with each other . You will have to adjust the clevices in or out as needed to keep the flaps even . Adjust them such that they are flush or ever so slightly above the wing root when the servo arm is forward( this can be adjusted out later if needed with trim or end-point adjustment). Hook linkage up to the servo and turn on TX . Check your throws. You want to get as much of the full throw of the servo arm as possible without binding up the flap . This is accomplished by adjusting the clevices position in the horn on the flap arm . Final adjustments are made with the radio via end-point adjustments ( assuming your radio is capable of that or via the clevice adjustment) . You will find that the flaps can be kept pretty even with each other in the "up" and "half" position but will fall slighly out of synch with each other when fully down . This is a result of the differing angle between the servo arm end and the flap rods as the servo swings . It is nothing to worry about and hasn't seem to affected my plane at all . In fact the plane floats with half flaps - I can't hardly imagine using the full flap . Seems if it wasn't applied gingerly, it could quickly cause a tip stall. I assigned my flaps to a slider on my radio . This way you can apply as much or little as you want . My radio beeps at the halfway ( neutral servo) point and that gives me about 21 deg. of flap - more than enough for landing or takeoffs . Hope that helps.

P.S. No need to wait until winter to do this. It probably took me as long to type this as it would to actually do it (slow typist) . If you're using the flaps in the static "down" position now, you can still use them that way. Just adjust your throw via the radio to that position and leave it there . When you're ready to use the flaps, voilla, they're ready to go and just a turn of a knob or flick of the slider away.