Twas at the dealer today and snapped a few shots of what happens if the oil drain plug is overtightened. Notice the sealing washer has two sides, one to the pan and one to the plug. I snapped a few of DC's revised pan and plugs. Enjoy.
https://www.turbodieselregister.com/user_gallery/displayalbum.php?&userid=7185&albumid=275
https://www.turbodieselregister.com/user_gallery/displayalbum.php?&userid=7185&albumid=275