A wafer test assembly includes multiple probe head substrates arranged like tiles with connectors attached to one side and probes supported on the opposing side. A haptic feedback device, such as a mouse or other device, includes a housing physically contacted by a user, and an actuator for providing motion that causes haptic sensations on the device housing andor on a movable portion of the housing. Optical systems record the position and movement of the pattern and are able to perform mathematical analysis of the pattern to determine the positional shift of the patient. The candle and the device are inverted and the wax around the candle wick flows through the interior of the heated elongate hollow tube and out a draining end of the heated elongate hollow tube thus exposing the embedded wick.