The good news is that I've worked out a way of cutting down how many unit models we use, too, which should hopefully free up another ten to fifteen slots for the Skaven if we're lucky. We might have to think about making more multipurpose models though - for example, an Ironbreaker with a flat-topped helmet could double as a Chaos Dwarf with a reskin, thus saving a slot. Adding extra bits onto models which can be removed easily by alpha channel is particularly good for this.
Lizards and Beasts are all in as of yesterday, too.