Just bought a Marutaka F4U Corsair .20 kit. The original design does not come with flaps and I'm thinking of modifying it to add in the flaps to make it looks more like scale. The 3-piece-a-side flaps will be control by a micro servo on each wing. Just wonder have anyone ever did it before on a .20 corsair. Also, how much degree of right thrust should I add it if I intend to use a OS .25 engine?There is no clear instructions on this.