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Re: 975's Working Arm
Well it's on our nonmoving chassis so there is no weight under it. Also, it has two mechanisms, a motor to lift the arm, which it was doing under its on power, and a motor that powers a lead screw that moves the arms in and out. As for the 80" rule, I'm pretty sure were ok there, but we haven't check yet.
And yes, it does fit in the 28 by 38 starting configuration.
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