[EricH]

Originally Posted by Cory

This picture shows you what's happening. The return cable is attached to the bottom of the carriage and then runs to a pulley at the base and then is taken up by the spool that the "up" cable is wound on.

330 did something similar when they did a lift; usually no pulley was involved to get the cable to the spool, though. The key trick is to make sure that the "down" cable is going out when the "up" cable is going in.