If you play Chaos, you need Obliterators. Since the stock models are hideous, you need to build your own. I went down a slightly less daemonic path than usual for mine. The idea of fallen Techmarines intrigued me, and the concept grew over the course of a couple of months while I shopped around on Ebay for the pieces.
And here’s number two. There’s quite a bit of greenstuff under the paint – but most of it is used as adhesive. It carries the weight of the metal servo-arms better than super glue, and also bulks out the arms under the terminator shoulder pads.