Dave---My good friend (who I have yet to meet)Machiel Kalf of the Netherlands told me in passing and just for the record that it was he who developed/introduced the chrome kingpin (for longevity of use?) so judging by your superb explantory handiwork we have something to thank him for. Keep up the good work.
PS
Simon gave me Machiel's contact details, and over Christmas Machiel made me one of his fantastic fully adjustable rear view mirrors----not cheap---but a real work of art with fantastic detail in the finish.
