Death Guard possessed Helbrute / Dreadnaught - Work in progress

A while back I got a £5 eBay voucher on Facebook, so I immediately put it to use and picked up an extra Helbrute for myself. Why not? It was only £2 in the end, plus I thought it might be quite good fun to mess about with and try and convert.

Obviously, with my limited skill set, any conversion work is not going to be ridiculously extensive, but here are some shots of what I've managed so far...

This is the top of the close combat arm. To which I have
decided to add an attempt at the mark of Nurgle using
the heads of some poor unfortunates. 

I was attempting to make them appear to be pushing their
 way out from below the surface of the armour plate.

I've given it this head from the new Plague Bearers kit.
I really like the bizarre rotten proboscis. It looks quite
unpleasant.

This was midway through what I've done so far...

I then started to add a couple of trimmed down trophy racks from the Chaos
Terminators kit. I didn't add them to my terminators as I thought they looked
a bit crap on a terminator size model. Particularly as I'd used the Death Guard
upgrade set that Forge World make. Including the trophy racks would have
made them a bit too busy. As well as crap. 

T'other side.

This is some sort of plague censer from the Skaven Plague Furnace.

Why wouldn't it be vomited forth from a mouth in the
palm of a power claw? That's normal, right?