Confusion leads to mistake
On to the next and final part for the RG Exia (excluding the weapons) after completing the body.
Parts of the hand
With all the nub marks removed, inner frame of the hand is actually very simple. All you have to do is to remove the wrist which is the same process as the RG RX 78-2. After removing the wrist, just bend the inner frame up to lock some pieces together and viola! A completed inner frame.
The only difference between this inner frame and the one with the RG RX 78-2 is that the Exia inner frame requires a foil sticker followed by the clear blue transparent piece.