I thought it was implied (or maybe stated) in the AMA insurance stuff, that if an AMA member flies a model at a non-AMA designated field, he is not covered by AMA insurance. Therefore, there should not be any issues with Terry (or anyone else) flying the model (large Concorde, or anything else) at a remote location. If the AMA thought that somehow a loophole could rear it's head, a simple signed statement from the pilot, holding the AMA free of any claims in case of an incident should be enough.

Of course, having the model fly at an airshow, or modelling event, would be a different story. I don't see why you'd have to pack it up and go to Europe to fly it, though!