It is intriquing to consider the electronic sensor. Again I believe it could be done with enough time and funding. A kind of engine saving look-up table. Hey, maybe one of the astro scientists who detect signals from space amid the clutter. So ceramic does't chip off like nickel-chrome and yet is is harder than the races a la lathe bits ? But I suppose one would have to develop different sensors for the different bearing designs also. Oh well...
OH yeah ...can't piezo crystals come to the rescue? As wear limits are exceeded at the race the piezo get squeezed and says "yikes," avoiding the noise problem?
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