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Originally Posted by Justin Stiltner
If you want a good example of what I mean go look at the curtains on your stage.... 2 pulleys, and your hand grabs one of the ropes, you can either pull down on it or push up on it (which actually pulls the rope up) this way your arm is powered in all directions of movement, which I have learned is a very good thing, gravity is nice, but with cables and such which can tangle when they become slack I prefer to power them in both directions.
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If you complete a loop with the cable/rope, there is no problem with slack (rather, just about as much problem with slack as you would have with chain) So, again, I'm not sure why one would use chain in this situation.