To futher contort the analogy: You're not reinventing the wheel; you know its supposed to be round an roll. Instead, you're changing all the internals to be a b

To futher contort the analogy: You're not reinventing the wheel; you know its supposed to be round an roll. Instead, you're changing all the internals to be a better fit for what you need. Wagon wheels are different from bicycle wheels, which are different from airplane wheels. All have a special set of characteristics, but everyone that made one didn't invent the "wheel" from scratch.