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Craig,
I have the truss tube collasible design. Aligning is not a problem , I generally use the brightest star hemisphere option.
I power mine from a 19ah jump start pack, It will last at least two nights solid use, probally more. The latter models of the Skywatcher truss tubes apparently have improved optics over the earlier versions, I am certainly impressed with the sharpnes of the 12 inch mirror I have.
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