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    Re: A-10 Sextant Manual
    From: Douglas Denny
    Date: 2009 Jun 8, 16:35 -0700

    Many thanks indeed for this.  You are most helpful and it is appreciated.
    
    I note the main worm shaft is spring loaded against a cone at the top to mitigate against 'end-float'.
    
    I am sure this is where lies the problem of apparent "backlash" when 
    approaching the object from different directions, from up or down.  There is 
    unwanted end-float occuring I am sure.
    This needs further investigation.
    
    Thank you again.
    
    Douglas Denny.
    
    Chichester. England.
    
    
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