Hi Nick, that is strange as mine just looks the same as your one.
I have 'spare' thread under the locking nut.
Maybe you could try to need loosen the locking nut. Put some masking or even better gaffer tape around it to protect the chrome, then loosen with some grips..
Ian
2011 Plus 4
Wild Mogs Reims 2019, Goodwood 2018, Isle of Man 2017, Carried on to Caramulo" 2016
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