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Hi Matt
To ease my collimation work, when I fitted Bob’s Knobs to my C9.25 I had it clamped on my work bench, targeting a centred object over 100m away in the day time.
As I removed each knob and replaced it with a Bob’s Knob, one at a time, I simply kept on re-centring the target (using the secondary collimation screws) before fitting all 3 knobs in turn and this procedure almost eliminated the need to do a star test. Just a small tweak was required later that night.
Cheers
Dennis
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