A method of monitoring the condition of a pump or at least one component of a system that includes a pump which component or components are not a part of the pump, includes the step of generating a predetermined test condition in the pump or system component or components. The system includes a detection module, a count module, a storage module, and a switch module. For the longer iron clubs, a wall extending from the sole portion of the cavity back golf club head to the bridge member defines a second cavity to further influence the trajectory of the golf ball. The actuator is capable of applying energy to ink within the ink passage such that the ink is discharged from the nozzle.