I've managed to collapse the base without a whole lot of trouble:

Next it seems like the head should be folded at right angles to the body:

What I can't figure out now is how to fold down the body. The photographs available online don't show it very clearly, but it looks like Lang has managed to get a very full, rounded body out of it. The best I can figure out is to fold the leg assembly down about halfway to the center axis, and crimp the corner inwards:

However, this leaves very little paper on the side:

The pictures seem to show a lot more paper on the side of the body. Is there some other way of folding the sides that will give a fuller body, or is this just what it ought to look like?