If you are that concerned why not take the courier option. For sure the women are 1000% worth the visit just to keep rubbing your eyes and pinching yourself in disbelief. No sh*t, really, it's unnnreal. I wouldn't risk taking anything apart, no container will be more protective than that metal casing, and you'll for sure void warranty dude.
Are you not concerned for your miner?
I've already paid 240USD for shipping, but I'm looking at ways to improve my ROI, so saving on delivery is one of them + maybe safer and quicker + I get to see Stockholm (again).
I've had lots of boxes from across both ponds. The safest and least-damaged boxes always came using the fastest method, so if they're using 1 day or 2 day shipment, I wouldn't worry too much.
If someone went cheap and went with like 1 week shipping or more (if that was an option, which I don't think it was), then I would worry.