these are nice... I took a bunch of photos of my arms several months ago (in no particular order), but I seemed to have missed a few positions (but I think I also got a few you didn't). Something I didn't notice before, was that, even with the palm facing down, the arm still has a little zigzag in it (when straight ahead). It looks pretty straight compared to when the palm faces up. Anyhow, it's nice seeing someone else's arms to make sure everything's universal (although you have little thin arms like me, so I should probably see if I can find some more musclely ones, too, to compare).
Ooooo... I can definitely make use of this. I really struggle with issues like this, it's why I don't often work with anything other than photo manipulation these days. On a complete side note, that top is adorable.