For this I´ve used the right hand of the Kodiak (not the grolar), and another axe of the new berserker/mad dog/rager kit (quite tricky to set in such a big hand).
Then I trimmed the kodiak "shields" in order to give the hands a proper look, mostly because the original shield is too big for this conversion.
Some gaps in the arm... I hate that.
And that is how the hand will look when finally glued.