>> Did the hardness change after a while (twice)? > > > My thought was it started out fine (freshly filed) and then wore fast. > > Barbara That still doesn't tell you what the critical component is to keep it quiet. Is it hardness, shape, length, or angle? Del came as close as anyone, nearly as I can tell, to defining a relationship between length, angle, and propensity for noise, by empirical testing, Hardness and shaping seems to make some difference, but continuing reports don't seem to indicate dependable permanence of the fix by these approaches while deflection angle and duplex length is left as is. Conversely, my own experience with shortening duplex lengths or increasing bearing angles correspond convincingly with Del's reports, and so far, haven't suddenly started making noise arbitrarily. Faced with a "this sometimes works - temporarily" approach, or a "this has yet to fail" approach, my money's on the short odds bet. Call me conservative, if you can, but that's my call. Ron N
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