Disclosed is a system for customizing a gift card. The upright frame includes a resistance bar pivotally mounted thereon. A secondary control circuit is coupled across the second winding to switch a switched element coupled to the second winding in response to a difference between an actual output value and a desired output value to force a current in the third winding that is representative of the difference between the actual output value and the desired output value. The mounting member is formed to be mountable to air part of a SCBA. Imbalance in space between the edges indicated imbalance in duty cycle. The connection section may include a performance board to which the device under test is mounted, where the lines of wiring are connected with each other on the performance board.