A system for fixing a substrate with a heat transferring device in an
assembled orientation; the system comprising: a substantially rod-shaped
positioning member having a length generally symmetrically oriented about
an axis and a generally constant lateral expanse substantially
perpendicular with said axis substantially along said length; said
positioning member interferingly fitting within at least one of a first
aperture in said substrate and a second aperture in said heat
transferring device to maintain a predetermined separation between said
substrate and said heat transferring device in said assembled
orientation.