1. A method for customizing a performance device, comprising: providing a baseline model defining modifications to a base device necessary to obtain a master device, including at least one modification calculated to improve performance of the master device over the base device; receiving at least one change to a parameter of the baseline model from a customer; responsive to the at least one changed parameter, modifying a plurality of other parameters in the baseline model to obtain a customized device having the improved performance of the master device; and generating manufacturing instructions, the instructions when executed by an automated production machine, causes the production machine to manufacture the customized device.