This is what he looked like before I started. Of course, this isn't a terrible conversion. He's got the giant, over-the-top 'urty syringe, drill, and mask on. It's pretty obvious he's a big ass Painboy. He's just gotten long in the tooth. My warlord should evoke my abilities as a hobbyist and I've grown a lot since then.
I rummaged through my bitz and found an old Enterprise nacelle I could use for the Nitrous tank as well as some pintle turret bitz.
A snug fit. I also added some chaos trophy poles. I chose the one with Necrons and Space Marines because WAAGH! Drillteef hails from Ultima Segmentum and they are the WAAGH!'s main opponents.
I used the bussard ramscoop from the Enterprise model and filled it with hot glue to make a new 'urty syringe I also cut the size of the "needle" down to a more sane (yet still over the top) size.
Start of the greenstuff work.
For the head, I started off with a fantasy Ork head because it'd be the easiest to put on the big warboss miniature's neck.
The best way to go about this is to build up around the base a little at a time so you get the right size. It's easy to get too big. It might even be good to stop and let it dry when it's relatively small. The greenstuff has a way of shifting while you work with it.
Here he is after day 1.
On day 2, I added the big scar across the top of his head, his big teef, and a few more bitz. I removed the heads from his belt; those were gross.
Here he is, completed in all his glory...
I am super happy with this model. I haven't received a lot of comments about him, however. Odd, that, but those comments I have received have been quite positive, so that's heartening.