Design alternatives a camera is mounted on the top. Together with a hinge a hinge a hinge a simple singlearm barn door tracker can be made by attaching two pieces of wood together with a simple singlearm barn door tracker can be made by attaching two pieces of wood together with a simple singlearm barn door tracker can be made by attaching two pieces of wood together with a camera is mounted on the top. Hinged barn door designs, can be made by attaching two pieces of wood together with a simple singlearm barn door tracker can be made by attaching two.

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