A high resistance region may be used to isolate the body of a first transistor from a body contact. A plurality of electrohydraulic valves are loosely received in openings in a base plate which allows the relative positions of the valve to adjust automatically for dimensional irregularities as the assembly is installed on the engine. A solder pillar is formed in the aperture and in electrical communication with the conductive pad. One or more antennas are disposed on the second substrate and a communication device is coupled to the antenna, wherein the communication device is disposed on the second substrate in substantially the same plane as the antenna.