The Alpha 60 is a big plane so I'm gonna say that if the ailerons deflect anywhere near 1/2 inch you should be fine for a trainer. Do you have this much available? I see in your gallery photos that you have the pushrods at the ends of the torque rods. This would mean that if you decide to reduce the total throw you will need to move the pushrod "in" on the servo arm. This would be done one hole at a time until you get to the desired throw specified in the manual.

I realize you have the 60 size. the 40 size by comparison has +5/16 up and 1/4 down for the ailerons. By this you can see that a lot of aileron throw is not needed.