I saw these and thought I'd give them a go.
https://smile.amazon.co.uk/gp/product/B005F409D4/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1
Unfortunately they are useless as they are dead flat on the underside - two of my grinders (Bosch and B&D, I've not checked the third) have ridges on the underside of the outer nut to centre the discs. Are all quick release nuts similar, or are newer grinders designed differently?
https://smile.amazon.co.uk/gp/product/B005F409D4/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1
Unfortunately they are useless as they are dead flat on the underside - two of my grinders (Bosch and B&D, I've not checked the third) have ridges on the underside of the outer nut to centre the discs. Are all quick release nuts similar, or are newer grinders designed differently?