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Yep possible spider vane issue or to a lesser extent secondary alignment issue
That’s why I didn’t buy the ONTC ( premium scope )
Instead I opted to buy the Klaus Helmerich Carbon tube separately and fit my own GSO hardware ( single blade spider vane )
I’m assuming yours is an f4 which is more sensitive to spider vane alignments / reflections than my f5 scopes
Looks like some fine adjusting and testing required over a few nights
Cheers
M
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