Very cool. Very,very cool.
Will you add any triangulation to the frame, or will the aluminum sheeting be fastened to the frame to provide stiffness? You might consider hanging some weight hung off of a torque tube clamped to one end of the frame. It would be interesting to see how much flex it has, and how it stiffens when you add elements.
Just my two cents worth. You obviously have the project well in hand.
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-Terry
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