Hi! I just now registered for the forum specifically to tell you how awesome your models are! Expect a lot of comments from me in the future! I was looking for examples of jungle bases for a tyranid army and stumbled onto your thread.

One thing that I think would be awesome for you to make would be a "dino's egg nest" style objective markers on small bases. I could imagine a cool scenario with the catachan forces trying to protect them from tyranids.