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    Re: A12 Sextant Maintenance
    From: David Pike
    Date: 2017 Sep 11, 13:24 -0700

    I’m still trying to find a four fluted Bristol wrench that’ll fit the grub screw in my A12 bubble chamber. Can anyone tell me the size I’ll need; not all kits, which I’ll have to order from the USA, carry a full set of four fluted keys?  I’ve examined the screw under a x10 magnifier, and I don’t think I dare risk using the ground down Allen key which came with the sextant.  Also, the number stamped on my bubble chamber is T265.  Does that mean I shouldn’t be disappointed if there’s no little steel ball under the grub screw? DaveP

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