Sea Dart missile launcher mechanism.
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Previously:
https://www.homemadetools.net/forum/...893#post160112
https://www.homemadetools.net/forum/...583#post151589
https://www.homemadetools.net/forum/...474#post151126
https://www.homemadetools.net/forum/...215#post149973
https://www.homemadetools.net/forum/...567#post151506
https://www.homemadetools.net/forum/...3245#post98463
