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I had problems with my Bobs Knobs collimation screws when I tried to install.
The LX90LNT has longer screws than the earlier model (it has 6 screws, 3 collimation screws and 3 more to mount the secondary onto the corrector plate.
Please make sure that the length of Bobs Knobs is the same as screws you take out. Screw the first Bobs Knobs screw fully in, the second screw you haven't touched fully in as well and try again. If this fails talk to someone who actually has seen the corrector plate dismantled - Don from Bintel in Sydney.
RGDS Joe
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