I drafted the pattern myself, and made two, I guess you'd call them "muslins," refining the proportions.
If I were to make this now, I think I'd shorten the legs and arms a little bit more.
Also, because I wanted to make this figurine as close to what he looks like in the books as possible, I added a fabric piece as neck, which, even though I sewed a straw inside for reinforcement, still makes the head and body a bit wobbly. If I were to make this now (or again), I'd maybe use the shell of an old pen and try to sew that inside to give the neck some rigidity.
Otherwise, I really like the result, and so does DS, which is what's most important!