Lovin' this guy! I like the use of the Vahki torso, never figured out how that could ever be used for anything besides Vahki :P Also, the arms are cool! They may need shortening, though, or the rest of the MOC may need legthening, I'm not too sure. All in all, a fantastic MOC!
This whole MOC is done really, really well. The torso and the upper arm are what sold me. I've never seen a use for those Toa Mata arms, except on the Toa Mata, but this is very clever. You've also managed to build a torso using that Vahki part, which I always thought was uesless. Well done.