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After bonding together all the structural pieces of the OTA, I used my wonderful Taylor & Hobson micro alignment telescope to see how much misalignment I accumulated up to this stage.
I measured a pointing error of 0.38mm at the centre of the secondary holder, which is good enough especially when considering that for a spherical secondary the optical axis does not have to go through its geometrical center.
For the next OTA, I will be able to easily reduce the pointing error by doing this test before bonding the CF tube to the truss section.
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