Iron Warriors - Dark Apostle

I realise that the Iron Warriors are not really the army to include a Dark Apostle if we're being totally fluffy, but I had been given the remains of the Finecast model (just the main piece). I wanted to be able to make use of this, but since I already have an apostle for my Black Legion, I thought I'd convert this one into something I could use elsewhere. The replacement chest piece was just a spare CSM one, likewise with the backpack and Chaos symbol. The bionic leg is just pieces of styrene with Greenstuff for the the rubber gaiters on the joints. One of the hands will be a CSM bolt pistol, and the other will be a a converted Grey Knights warding staff (when I can find one)·