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Emyr
hippy
@GrahamLaming
Hi @hippy
Mine is an old Crank Brothers aluminium mini-pump barrel. I filed the ends so that they match the radii of the aero-bars, which stops the bodged-bit from rotating. Very slightly wider than the internal bar pitch, so a snug fit.
Plenty of room for hands, and perfect for eye-line, easy viewing not too much neck movement needed.
Around 20 000 miles with it so far, confident secure mount.
Also shown are the Electron LED lamps under-slung.