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It does surprise me with these premium intruments that optical defects ( ie astigmatism , corrector lens wedge etc ) can slip through . It suggests that they are not given a thorough end to end artificial star test upon final assembly, to make sure it is meeting spec and that the customer is not going to see optical defects on the real sky. I would have thought that that kind of thing was what you were paying extra dollars for.
It is not rocket science to set up a collimating telescope of larger than the aperture to view an artificial star upon final assembly and tweaking. Celestron for example in their heydey used a 22" of long focus telescope to produce a collimated beam and final checking on hundreds of thousands of telescopes.
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