You’d better check with the consulate of each country you’re going to be in to see what documentation you need to get the harp into that country. Maybe just checking with the EC rules will take care of it. Most countries and the EC are going to assume you’re bringing the harp into the country to sell it, and they want to be sure they get their taxes and tariffs up front. So you either have to buy a bond from an American company that proves that they will get paid if you sell the harp in the country, or you have to pay a huge percentage of the value of the harp when entering the country. And good luck getting any of it back if you don’t sell the harp. They make it as difficult as possible to get a refund. You’re much better off trying to arrange to use a harp already in Europe.