How final are these shots? Maybe they are still to add some detailing like in the the abdomen.

I am not fond of the sword as it looks as if he is holding a tree leave or something but that is minor.

When it comes to customs, I think it's low risk. Although technically all 'P-38' gun Megatrons are banned, they have only really enforced it with MP-5. I don't know of any incident of a G1 Megatron being confiscated for example.