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Look through 5 mm paper eyepiece hole again and adjust main mirror's clips until everything is symmetrical,
as shown.
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Cut two rings of tube material, and cut out two triangles on opposite sides, as shown. Use a paper template to help marking out.
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Cut two strips of tube plastic and fix to rings with small nuts and bolts, or with small
woodscrews, so tube s clamped between. If tube slips, enlarge holes in strips and add washers to screws so you can adjust ring separation slightly.
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