Get those legs out!
I have done some more work on this creature. After fixing the legs to the torso, the model looked weird, the limbs looked gangly, the stomach long and the bottom flat! In the inspiration picture the buttocks are quite high up and this was not the case with my initial mock up. The only way I felt I could rectify this was by re-sculpting the thighs. This was the first work properly sculpting limbs. It really helped having the plastic underneath. The muscles won't be anatomically correct because I just made it up, I figured it could all be synthetic muscle stitched into place to help him lift the great thing on his back!