There you go then, a place to add a storage for Hormones. Simply place the machine or gland in a neko's breasts. I mean geez, it was already used to store fuel. And by the way, not all amunition is incindary bullets these days, yet a good spark from metal scraping on metal, or the heat caused by a bullet punctering metal is enough to set off a car full of gas. ((correct me If I'm wrong about the incindary bullets, I'm not really sure)) But back to the Hormones. Not that I'm taking Kayto's side just cause me and him are together and all, but he does make a good point. There has to be some template or something along that line, so that a neko can be somewhat the same in frame, yet different after being customized. Each frame of a Neko can have a hormone gland installed into the breast before they are customized, just like they have thier internal organs put it, as well as everything else. Again, I revist my topic of making that which we are trieing to humanize, more like humans, and less like machines.
Edit: And by the way Uso, about the hair topic. Hair actually adds no real padding to the top of the skull. The top of a person's skull, the bone, is actually the weakest bone in the body. So the Neko would have to have a tougher skull anyways. Hair adds no padding, all it is meant to do is to shield the skull and the skin of the skull from the sun, to add a somewhat decent temperature control item to the head, ((Mainly to keep heat in, not out, as hair is a insulator.)) The hair is to thin to be really effective as a padding, unless you have a rather large afro. But even then, it adds no real padding to anything that would actually be of any harm to the skull.