Though Warpath is still a way off, I've been painting Forge Fathers in anticipation. These fellas are the elite infantry of the Space Dwarf fighting forces – the Stormrage veterans.
As my squads so far each have matching helmets, I swapped heads on two of these minis (the Hailstorm Autocannons) using the hot-water-sharp-knife trick. Even with their heads quite set into their torsos, this was really easy – and the heads I've removed are perfectly usable in future conversions. The Thane is uncoverted, though his base gives him height as is apt for a Warpath unit leader.