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v7s appear to me to be de-adjusted at the factory as a deliberate policy. If you sort of wobble the laser unit, if there is vertical play, then the azimuth needs adjusting (tightening) so as to have the angle of the lens to the disk at optial. If that doesn't produce the result, then a 10% downward calibrationof resistance in the pots could be attempted.
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[b][color=red]Charlie[/b][/color]
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