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Slice,
Sorry, One more thing. The astigmatism issue had nothing to do with QC, it was a design spec fault. All of the secondary holders were specked marginally undersize or the mirrors oversize, 1 of the 2. GS's quality control is very good for a Chinese/Taiwanese mass production organisation, it is way better than Synta and the other Chinese optics manufacturers. I am yet to find a GS dob with a "BAD" mirror after minor issues were resolved. On the other hand some of the GS mirrors are excellent, my own 10"/F5 GS mirror is an absolute cracker.
CS-John B
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