this absolutely cleared the clutter out of me...for a moment at least...off then on again....to play off your subject....the digital "switching" of today uses a "mode" called saturation....ie saturation mode switching....this seems easily extended to your subject as we are mostly becoming saturated ourselves...and are thus only able of switching....with no in betweens...oh well, your material always gets me off on an entetraining tangent... what a pleasure....thanks