What's the purpose of using ball links on non take apart stunt planes? With the bell crank in the center position, the flaps should be a level position. Once the plane is done, you would have to cut the plane open to adjust anything. Seems better to have it in the correct position the first time. Same question for the elevator, it should be neutral with the flaps and bellcrank neutral. Although I can see the adjustable elevator horn being beneficial to correct any bad flight characteristics. So what am I missing? Also, what kind of ball links are being used? Thanks