I think it's WONDERFUL that you posted these pictures for us!! I have never seen or even heard of a chinchilla spaying yet, this is such valuable info!
I have to ask, because I'm still licking wounds, was the forum that gave you a hard time, perchance, Chins & Quills? They are quite meddlesome and prohibiting, without due cause, from my experience. There are some discussions there that the administrators simply locked out because people were expressing strongly-felt opinions, as in the fur-related forum that I wanted to add to, but couldn't. What a shame!