Wow, nice graphics! I'll throw these ideas out for discussion.

First, it's a trainer, so getting these things perfect is not required. However, it's great that you are looking at them, because this kind of adjustment will be important if you want predictable aerobatics.

I suspect the reason you have different amounts of throw is that the aileron control arms are different lengths. When you are setting up ailerons the first thing to do is make sure the servo arm is centered. You also want to start with the attachment point on the aileron control arm to be the same height from the centerline of the aileron. Adjust the length of the aileron control rods so that each aileron is centered when the servo is centered. If one of the ailerons has more movement than the other you need to either increase the one that has too little, or decrease the one with too much. You adjust the amount of throw by changing the length of the aileron control arm. Making the arm shorter will give more throw, making it longer will give less throw. I'll see if I can draw up a little graphic before Minn beats me to it.