Quote:
Originally Posted by sanddrag
968 used a bungee cord between the carriage and the down wire rope.
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It looks like 254 did the same using a spring on slipstream.
http://media.team254.com/2012/08/slipstream.jpg
With cascade there is usually not a problem. From what I've sent eh more popular solution with cascaded elevators is chain, belts, or rack/pinion, which either isn't prone to losing tension or can easily be tensioned using a method other than a spring.