An apparatus for sealing a bag of encased material is described. In one preferred mode, a flex circuit is populated along each of its first and second major sides with two ranks of ICs which are, preferably, array type devices. The notch section may be configured to radially extend to at least the center point. Assignment of part numbers to an appropriate location within the configuration enables generation of a three-dimensional solid model for testing in accord with known rules defining interference. The prosthesis can be provided as either a front actuator configuration or a rear actuator configuration.