K2W

First time Poster, long time lurker... Actually, The Chain Dog is the part of the train that connects to the actual chain on the lift hill. The Anti-rollbacks are the "notches" if you will that are built into the lift track, If i'm not mistaken. I believe I also read that it will indeed have two lift chains, one that acts as the lift and one that acts as the anti-rollback unit, to catch and hold the train if a problem occurs.