A method and apparatus for controlling a plunger of a magnetic actuator includes generating a first magnetic flux at the plunger that biases the plunger opposing a first bias from a first spring having a first spring rate. Four corner panels, one corner panel positioned at each respective corner of the generally rectangular bottom panel as an integral extension of one of the side wall and the end wall and connected to the other of the side wall and end wall to form the box. Each of a first and a second of the access transistors has a source, a drain, a front gate, and a back gate.