I've started doing some simple ERC for the chain, just Side-Side All, Bend All, Twist All, and some dials to stop the chain links from rotating on various axes, which can be handy when posing the chain with the cursor. I'll also try to find a way to make gravity curves, though it won't automatically give you the correct curve, you would have to judge by eye when to stop turning the dial. That's assuming that I can get it to work at all.