Correct me if I heard wrong but isn’t the curved side of a crush washer is supposed to go toward the case or item that it is connecting to, because that side is what the washer is conforming against to make the seal,..not the bolt head end.
Seems like comparing apples to oranges, regarding the thickness of the differential washers. The dealer retail prices for crush washers are obscene. Additionally not to nitpick your good vid, but noticed a typo, the aftermarket price per differential washer was 33 cents each based on 20 washers.
cardo Math was not my best subject :) I divided by 10 and not 20, oops. The thickness of the differential washer will not affect the effectiveness of it.