The previous "rotation" images were taken nearly at the
zenith of the sky. The next step was to test whether the
collimation held when the scope was pointed at different
angles. So, I pointed to one spot lower in the south,
and then to the east (refocusing for each move).
Though the star shapes are still good in the first
of these (in the south), they begin to deteriorate
slightly in the second set. Perhaps something is shifting
in the system as the scope's angle changes. But, again,
the story continues in the next image...