You brought up a point I have always wondered about. Why don't razor manufacturers and restore artists use screws rather than pins for the pivot pin, as all razors keep getting loose and tightening a screw just a tad is a lot easier than banging on the pin with a small hammer or the back of a spoon?
When I rescale my 7/8 WB and 6/8 Henckels, I am definitely thinking of going the screw route rather than pinning, at least at the pivot.