other items
A few other items on shipping.
1) According to COGSA, the value of one "parcel" on a ship is a max of $500. This means if your container goes over the side, you get a check for $500. Game over. Make sure you get insurance! This applies to larger items, too - a locomotive is considered "one parcel", so here's $500 (and it made such a huge splash!)
2) Wood used in packing for international shipments may have to be marked as fumigated. This is shown by branding - it has some special symbols and information. You might do best by obtaining pre-fumigated shipping pallets and knocking them apart for your wood. Lumber yard wood doesn't qualify for this. Customs may reject the shipment (deny entry) and send it back to where it came from - guess who pays?
3) Second the motion of keeping the container contents limited to aircraft and aircraft parts only. I know someone (not "heard of someone") who imported an airplane to the USA, used toilet paper rolls to cushion some spare parts in shipment. The customs inspector (new hire, evidently a TSA reject) claimed he was trying to import household goods . . .
Best Regards,
Echo Mike