What if you had the notion of a VehicleSpec object that can respond differently to each product class? It will also only allow setting attributes depending on who the caller is (e.g. a Car-type class has no place dictating how long the hand clutch would be). Then each product class will only need a single attribute for the specification it needs.

Just my 2cents. Not sure which direction this will push your code in.

In reply to Re: Builder design pattern with lots of parameters - trying to declutter design by repellent
in thread Builder design pattern with lots of parameters - trying to declutter design by tospo

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