The production rate, useful life and operating efficiency of electric submergible pumping systems is improved by operating the system so that the motor is cooled by two passes of production. An external routine is stored in the first table so that the database management system is allowed to automatically manage any modification related to the external routine and to control access to the external routine such that administrative support is minimized. The method also includes covering at least a first portion of the array of fins using a first masking material and removing the first epitaxial material from an uncovered portion of the array of fins.