Posted by Michael Gilligan on 07/09/2017 16:58:56:
Been doing a bit of 'research' on my 'bus journey:
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MichaelG.
Another good find Michael – I might have guessed someone's been at the problem before. The bit where he says "The tool used was like a shouldered screwdriver" and "spun at high-speed" is interesting. Got to be worth a try.
The photos of various Meccano parts sans boss are revealing too.
Thanks,
Dave