My general remark re bias applies to all things. When i press mechanisms I run them in and out and you cal feel if there is a problem,I always press mechs extended,helps me.
One of my worst experiences re choices came in a court of law where I appeared for a friend as an expert witness. I learnt that subjective evaluation defeats any call,ie is the item or service to be paid for is real iffy. My friend lowered her claim and romped in the full amount in the lower claims court where the overbright legal people back off prosecuting.
The general and not accurate assumption is articles from mainland China are so far removed in quality from Taiwan peoples republic of China,this is not so these day good ,bad and indifferent abound in both places. On trips from one of our largest suppliers here in Australia to both China it became evident so many pen related dealers have businesses on both sides,many of the shop fronts when visited revealed teams of workers reducing huge numbers of items to the small plastic sleeves we are familiar with. In one instance passing a guy in a side street making quality brass tubes for pens etc. Another truth I find hard to understand is we pay in our currency,lose heavily into US dollars,pay air freight that turns out to be another racket actually using air mail postage.
It rests uneasy with me when wholesalers also retail from the same premises.
Kind regards Peter.