I personally don't believe this is as difficult an issue to fix as you believe, it only affects two faces of the cube, if they can get 4 out of 6 to work fine, I'm sure its something that can be fixed by tracking down the differences and sorting it it out.
Fuami
I personally don't believe this is as difficult an issue to fix as you believe, it only affects two faces of the cube, if they can get 4 out of 6 to work fine, I'm sure its something that can be fixed by tracking down the differences and sorting it it out.