Best way to ship a fully built PC internationally?

I’m planning to ship my brand new PC overseas (preferably by sea) and could use some advice from anyone with experience.

Has anyone here sent a fully assembled PC internationally? If so, how did it hold up?

As you can see in the photos, it’s already well protected, but I’m wondering if it’s enough. I’m also considering adding another layer of protection—building a plywood crate, wrapping the original box in bubble wrap, and placing it inside a custom-built outer box.

Does that sound like overkill, or is it the right approach for something this valuable?

Appreciate any tips or lessons learned. Thanks in advance.