Very nice work on this conversion. You've integrated all the shapes really well on the top half of this guy, and you've really nailed that mechanical, chaotic look.
Though I think the legs are a little clunky and they let it down a bit, they don't quite sit right. But i really like how you've used the lascannon barrels for the thighs.
I think you have a really interesting and well defined style, and i can't wait to see more!