My issue with the current system is that you replace the washers each time you need to remove the hub. That can be quite often if you get a lot of water, mud and gunk on the swivel, which tends to prematurely destroy the scraper and seal thus allowing water ingress.
I have seen when you follow the manual and torque the hub nut to spec, it actually drags the washer tab with it a little bit which weakens it rendering it unsafe to re-use.
https://www.ebay.com.au/itm/2-Front-...UAAOSwyWZZOgzm
I was quoted an exorbitant price, locally, for the washers, that is why I had some made.