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then i tested how the collimation held throughout the night and in the areas where i was getting the elongation.
First there are 2 collimation tests at the zenith some time appart and with much slewing in between. then there are 2 test - one over the south and one over the north. It appears collimation held also. However, if looking closely, there seems to be a minor amount of movement between the 2 zenith tests.
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