I received my Steampunky waistcoat from thatbluesea today!! The colours are absolutely dead-on perfect, and it's made almost entirely of very properly waistcoaty woolens, with a few bits of black cheesecloth thrown in to make you take notice. (I love dyed cheesecloth, as thatbluesea will see when she gets her package!) There's also a few bits of black and white ribbon, camouflage cloth, etc.
Here's a better picture of the front. (I've just realized I didn't take a proper picture of the back).
As feared, it is a bit tight, but not too tight, and perfectly fine if worn unbuttoned. So I probably won't have to do more than move the buttons to the other side. The whole "men button left over right, women right over left" thing makes my head hurt every time. I always have to mime buttoning something up to make sure it's the right way around, and of course if it's a woman's garment, I have to somehow reverse that, which is so confusing... So don't feel at all bad about getting it wrong way round! And it's easily fixed. I'll also move the pocket down to accommodate my watch chain. (We had a bit of a discussion about this, but I never did clarify where it ought to go. Sorry!)
Anyhow, I love it and I love the fact that our interpretations of Gibbous style are so similar. It bodes well for thatbluesea liking what I've made her!