When there was some New Developments the PTB stamped on them very quickly like the Gas Turbine Cars which all flamed out during a race and then had the rules changed to make then uncompetitive.
Somehow choosing which plastic to use in a Window in no way improves the End Product which is what we all drive. If the current Nascar Rules where in place when they started we would still be hand cranking engines to start them and wondering what brakes where today.
Col
