Change Rotary Cutter Blade

What side does the washer go on, , also is the washer put on with concave or convex to the blade?. You mentioned there being a right side to the blade. .Do the blade numbers go face up or face down? Thanks

OMG, thanks so much for this video! I just bought a new pack of replacement blades and could not for the life of me figure out how to get one blade separated from the other four without cutting my fingers off!! Why in the world they don't provide instructions is beyond me! Your video was a life-saver!!

Hmm. I wonder if people throw those old blades away. I can think of a few things to do with those...