A method of using an injection molding machine, the method comprising: first, injection molding using a first injection molding machine, a first mold, and a native controller to injection mold production versions of a plastic object according to an original mold cycle for the first mold, the first injection molding machine including an injection unit, a nozzle in fluid communication with the injection unit, and the first mold, which is in fluid communication with the nozzle, wherein the native controller is programmed with at least a portion of the original mold cycle, wherein during the original mold cycle, the first injection molding machine has an average original mold cycle machine temperature profile; and characterized in that the method further comprises: second, injection molding using a second injection molding machine, a second mold, and a retrofit controller to injection mold production versions of the plastic object according to a retrofit mold cycle for the second mold, the second injection molding machine including an injection unit, a nozzle in fluid communication with the injection unit, and the second mold, which is in fluid communication with the nozzle, wherein the retrofit controller is programmed with at least a portion of the retrofit mold cycle, wherein during the retrofit mold cycle the second injection molding machine has an average retrofit mold cycle machine temperature profile; wherein the average retrofit mold cycle machine temperature profile is 5-50° C less than the average original mold cycle machine temperature profile. first, injection molding using a first injection molding machine, a first mold, and a native controller to injection mold production versions of a plastic object according to an original mold cycle for the first mold, the first injection molding machine including an injection unit, a nozzle in fluid communication with the injection unit, and the first mold, which is in fluid communication with the nozzle, wherein the native controller is programmed with at least a portion of the original mold cycle, wherein during the original mold cycle, the first injection molding machine has an average original mold cycle machine temperature profile; and characterized in that the method further comprises: second, injection molding using a second injection molding machine, a second mold, and a retrofit controller to injection mold production versions of the plastic object according to a retrofit mold cycle for the second mold, the second injection molding machine including an injection unit, a nozzle in fluid communication with the injection unit, and the second mold, which is in fluid communication with the nozzle, wherein the retrofit controller is programmed with at least a portion of the retrofit mold cycle, wherein during the retrofit mold cycle the second injection molding machine has an average retrofit mold cycle machine temperature profile; wherein the average retrofit mold cycle machine temperature profile is 5-50° C less than the average original mold cycle machine temperature profile. second, injection molding using a second injection molding machine, a second mold, and a retrofit controller to injection mold production versions of the plastic object according to a retrofit mold cycle for the second mold, the second injection molding machine including an injection unit, a nozzle in fluid communication with the injection unit, and the second mold, which is in fluid communication with the nozzle, wherein the retrofit controller is programmed with at least a portion of the retrofit mold cycle, wherein during the retrofit mold cycle the second injection molding machine has an average retrofit mold cycle machine temperature profile; wherein the average retrofit mold cycle machine temperature profile is 5-50° C less than the average original mold cycle machine temperature profile.