If you want to find this (unwatched) thread, find it thru recalling this shortcut URL: https://tinyurl.com/wdyst today i sharpened a blender's 4-wing blade which was still assembled to its rotating socket. each blade wing had a different height (relevant for sharpening clearance) and orientation. i used 3 different portable ruby stones to get the task done. also a wood strop. not an easy task because the bevels weren't easily accessible (orientation, narrow blade width, lack of clearance, recurves) the other day i resharpened a Graef bread cutting machine's 15cm disc blade. every other year i do that even though the blade is sharp enough. same tools used. was good fun, looking forward to the next time!