To ship the crate as freight, fit two pieces of wood to the bottom to allow handling with a fork truck, then look in yellow pages under international freight forwarders. If a man in a big truck comes to collect it, and he's the kind that won't lift anything, you put the crate on the truck and then load the guitars into it - so don't seal it for transit until you know there's no more manhandling to do. If the crate is not fitted with the legs, it will have to be shipped strapped to a pallet, which will add to the weight and encourage the morons to stack things on it. If the legs are on the narrowest side they are less likely to put something heavy on it. Also, you can buy tilt indicators which have a liquid inside which shows red if a case has been tilted in transit - I've seen them on delicate equipment I've delivered, which has been shipped from US to UK. These seem to encourage careful handling. Talk to your freight forwarder.