Preferably, an embodiment of a sensor probe assembly includes at least, a flexible, highly electrically conductive signal sensor component. The flexible, highly electrically conductive signal sensor component provides a main body portion, a plurality of spires protruding in a first direction from a first side surface of the main body portion, and a conductor confinement feature formed on a second side surface of the main body portion. The second side surface is an opposite side surface of the main body portion relative to the first side surface, and in which each of the spires protrude from the main body portion not less than twice a thickness of the main both portion
