Valve pins
Next is the placement of the valve pins that prevent the valves from having too much of their own will (”Could be fun to stick to the wall...”, ”Maybe I could get sucked closer to the air inlet hole...”).

A little tool was used for this:


With the piano wire cut the right length, a pressure with the long, bent pliers will press it almost through. The pins were later secured with a dab of epoxy glue.


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