in short, the top ailerons will have more travel than the bottom depending on where you place the horns. ideally, like on the ultimates, the connecting rod should be on the trailing edge to get the same throw. but there isn't enough room or threaded rod to do that. so I just made sure the measurements were the same from left to right, put the two servo's on seperate channels so I could adjust the travel on the flaperon mix,and let it go at that.