A little mechanical excitement

[Django]

If we lived in the post apocalyptic world of Mad Max, with no reasonable alternative, I would suggest thorough cleaning, duct tape the hole outer surface, pour liquid steel or some such into the cavity, Let dry, remove tape, cross fingers, and go another gazillion km.

Ben

That's the way to go! I would add 1-2 bent stainless steel paper-clips to give more stability, like iron in concrete.

But then, that's probably German uber engineering again...