machines/howtos/make-clock-from-recycled-plastic/step_3.md

Postprocessing

Cut out edges with knife, You can sand surface. Drill hole in the middle according to size of your clock mechanism. List of components and tools for clock assembly that I use - available in supporting material. I buy them from Czech company. On back side of clock there is small square frame which fits to the clock mechanism I use. You can modify mould as you want. I prefer to fix position of clock mechanism to prevent its rotation. I do not recommend sanding of surface if you use plate with numbers (area around numbers can be difficult to sand). Nice advantage is different colours of clock hands, you can combine different colours. :)