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hmm I feel the originals screws were much stiffer in their socket than the bob knobs, you had to apply a lot of pressure with the allen key to turn them.
with the Bknobs it's very very easy to turn.
and I'm guessing vibrations & bumps will have more effect on the bob knobs then on the original screws.

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The original screws ain't "stiffer." If collimation isn't holdin' you don't have the knobs snug enuff.



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