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Just how high does this thing go? Are there 3 stages in there, with about 3 feet of travel each?
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Our arms are mounted off the bottom of the third section of the lift and that gets up to about 7ft. But the total hieght i ssomething like 9ft, and thats with a generous over lap to prevent any wiggling or getting caught in the extended position.
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3. Hmmm... 2 arms... good for balance, but why else?
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Each arm will carry one tetra, so having two arms allows us to grab and hold two tetras at a time. It also enables us always to be closer to any tetra we want, so we will always have to rotate less to get an arm pointing towards a tetra.