There is disclosed a method of encoding a latent image. In this process, a resin including solder powder and a convection additive is supplied onto a substrate having a plurality of electrodes thereon. The separating assembly is placed near patient tissue that is attached to the object, the sheath is rotated to move the separator distal to the tip, and the separator is applied to the patient tissue that is attached to the object, so as to separate the tissue. The one-piece field core also contains a mounting flange that encircles a center axis of the disc and extends in a perpendicular direction to a top external surface of the disc and parallel to the center axis of the disc. A scale may be placed on the draw sheet to facilitate recordation of shifting occurring during treatment of the patient.