I was hoping to do a whole feature on it's replacement and subsequent brake adjustment and bearing greasing. Well it's all getting done at the eleventh hour also the brake lever was desperately easy to fit being only the pivot bolt and the threaded rod to remove.
Thank you very much Tomt for giving me your surplus coupling. The gas strut will be possibly going off for refurb to save me from having to strip another coupling to send the strut off for refurbishment.
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I suppose i should have taken a picture of the replacement but as may be appreciated they are not normally that shape.