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Rick, the way 'flex' manifests itself in a scope is when you first aim the scope to zenith, and the optics are collimated & stars are pinpoint, you then drop the scope to view something close to the horizon, does the image of the stars distort from pinpoint to 'comet' like. This shows that the alignment of the optics has been compromised in the shift of position.
This might indicate flex in the OTA, but also and not exclusive of a weak primary mirror cell, or a weak secondary/spider arrangement, or movement in the mount, or movement in any other component or combination.
Congrats on the scope, though. Nice light bucket you've got yourself.
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