Obviously all major car parts made of metal (except for the bodywork) were lighter and stronger if there was a hole in them... The idea is quite simple (once you are familiar with shell structures) - the question is why this light-weight technology is not applied? Maybe car producers and customers are afraid of corrosion and decay which however could be prevented by another achievement of modern plastic injection moulding: the plug...
Best wishes, Joseph de la Mikula and Team
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