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Originally Posted by Rick TYler
That looks a like surgical tubing and a bungee cord under a clear cover. Are you using that to counterbalance the weight of your arm and a tetra??? I suggested this to our team, but they went with a slower arm (more torque) instead. If it is used to store energy, how does it work?
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Actually, the surgical tubing is holding a cable which goes up to the end of the telescoping arm. It's to keep the cable tensioned as it extends and retracts.