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Fred,
You wrote: "I haven't studied the following experimentally, but it seems to
me that sextant mirrors take a while to "settle down" after they are removed
for cleaning, etc. It also seems better not to adjust them if there is no side
error or failure of index mirror perpendicularity, as long as the index error
is a reasonably small number, such as under one or two minutes of arc. "The
Sextant handbook" also cautions against over-adjustment. I wonder what other's
feelings, experience, etc., are about this."
On the rare occasion I adjust a mirror, I finish by giving the mirror frame a
few taps with the back of a fingernail. Perhaps there's no point in it, but
it can't hurt.
Bruce
