The problem as observed from the pics would be difficult based on not knowing what material the plane is constructied . The real P40 flaps go slightly into the fuse base , and were much wider then the Skyshark initial release . So you would have to remove the flaps , rebuild them to proper size then attempt to remove the proper amount from the wing and fuse to accomadate the new flaps . I think that is a lot of work for a ARF that will most likely be around $700 to $900.
Skyshark, the owner and the kits are nothing but first class so I assume they have there reasons for the variance from scale . WHo knows the final version may have this corrected , I know they were not happy with some of the characteristics in the test plane and in-tern held release . That reinforces my belief that they only make first quality products .