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There are three JR 4131 servos in the tail, two in the wings and a standard one for the throttle. It is covered with Monokote Yellow and trimmed in Insignia Blue trim strips. I also have dark red striping. The front turtle deck is also Monokoted but the canopy is sprayed with Silver PPG paint. Hope this answers your questions.
The one I am selling has two in the tail and the rudder servo is just behind the cockpit on a pull pull system It is the one with the OS 120 and in order to get the CG right without adding weight it had to be there.
The Saito 180 has the battery in the tail area also. It needed to be there along with the rudder servo for CG. I hope this makes sense to you. If not send any questions to
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Jim