Left side of the back after the rear armor has been added. Note how the bloated stomach just kind of oozes out from this point.

You can also see a little worm poking out of the stomach on the front side. This was done by making a hole in the flesh with a burnishing tool (while the GS was still wet) in a similar manner to the holes on the back. After that, it's a simple matter of making a suitable worm out of GS to stick in the hole.