Has anyone sent their Diezel back to Germany for repair/upgrades? I'm wondering what to expect as far as shipping costs? I just had a guitar shipped from Germany to the states and it was over $500 It was a rare guitar so I coughed up the $$$ but I can't imagine people are paying that much to send their amp in for repair/upgrades. Sending it inside the US probably isn't an option for what I want done.