Does this brush also fit on the Sonicare 6100 or 5100 toothbrush? If so, how does this work with the automatic change of the cleaning mode? (With the "other" brushes, it is communicated via RFD chip whether it is a Clean, Whitning, etc.... brush and the mode is set accordingly. I would be interested to know how Philips has solved this now that there is an "all in one" brush. (which I find very positive in principle) :-) Thank you for info...