Taking only two pieces of wood, two tee nuts, a round nut, two bolts (all 1/4" by 20tpi) and a hinge, this project is inexpensive and easy for anyone handy. The key is to place the winding bolt at 290mm from the center of the hinge.
Winter is a great time to explore the sky in the North, as the air is dry from the cold and the sky often clear.