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That is exactly what I was asking about.  You will probably need to
clean the micrometer movement.  Get a copy of "The Nautical Sextant" -
It goes over the maintenance of the SNO-T quite thoroughly.

Cheers!

Bruce

Quoting Markku Kalima :

>> does it release to move easily and consistently or does it
>> occasionally hang. If it doesn't hang, you are fine.
>
> I'm not quite sure what do you mean by hanging? The index arm moves
> freely and the force needed to move it is quite constant. Only in
> the position approx. 70 degrees, where it has been kept for long
> time in the box, there is a slight jamming when releasing the
> arm/drum, but it goes away after moving it a bit. This might be due
> to old grease or something like that.
>
>
>
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