So I finished the first gun prow for the escorts today. While I realise that it is not a popular design amongst members here, I went along with a good old-fashioned shark/pig/squig-headed design. It's classic, tried and tested, ugly, and has some common ground with official models, so it'll suffice for now as almost Orky.
So here's my first conformation of pieces:

and from the other side (I'm not good at cameras and sizing):

And finally an exploded view to demonstrate how it all goes together:

It's far from the best, probably has nowhere near enough vertices, and I'm not happy with that neck (and the eyes), but hey, I'm impatient, and it's a start.
Ideally this has been designed to a scale of 1 unit=1cm, so it will hopefully be about 3-4 cm long at the end. I'm expecting all manner of printing faults from this, and a lot of filing required, but I'm going to get this uploaded and try and get a test print.
Edit: On the off chance that anyone Cares, I've opened a shapeways store now.(
https://www.shapeways.com/shops/pivole)
The model needs some thickening if it's to be reliably printed though, and it's far too hefty to be viably costed in FUD.