I've started mocking up a volkite culverin grenadier to really take advantage of Armoury of old Night and Legacy of the Great Crusade.

I have enough bits for four of these guys, two in each lasrifle grenadier squad. 

This is a tempestus scion body with man portable heavy weapon arms (armoured) and a heavy ion blaster from Anvil Industry. I wanted something distinct from the typical volkite culverin to represent a local pattern of the weapon.