I've got a question. I was just reading through a recent thread about leaving a SBR at a friends house while overseas. There seemed to be a lot of folks who are of the opinion that a person who does not possess the proper tax stamp cannot be in possession of an NFA item at any time. How does this work with the various shooting schools around the country who offer full auto classes, or the "machine gun shoots" that I hear about from time to time. How would a person not "be in possession of the full auto firearm" in these cases?