I've been thinking about adding either rack pulls or RDLs to my routine. I had a question regarding RDLs, though. Basically the only rule that is difference from deadlifts for RDLs is that you only bend your knees as much as required to get your back exactly parallel to the ground, while at the bottom of the lift. Is this correct? I've watched a couple videos, and this is basically the only difference I could observe.