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Ditto on the locking knobs. Cannot understand why they put them in. On my 12" GSO I replaced all the collimation knobs and springs with Bobs Knobs and found that it held collimation easily with the stronger springs.
I don't know if GSO have updated their springs when they went to the new knurled knobs that they now have, but I would have thought it would be much cheaper to use better springs and ditch the locking knobs.
Malcolm
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