First off, very nice avatar image you've selected.
You are exactly right about the improving techniques used by counterfeiters to produce their wares. In the case of this badge one cannot rule out the use of surviving stamping dies either. My feel on it remains favourable as this unit badge is not particularly valuable and I would question whether the expense of making a multi-part fake would be economically worthwhile. Having said that please note that this opinion is by no means the final say on authenticity as I am no authority - merely a student and collector like yourself. And all the more so as any comments I offer to member questions are without benefit of handling the items, which is very important in most cases, and certainly before buying unless a money back guarantee was being offered.
It's a risky hobby, so remember to question everything and to approach any item with an attitide of "guilty until proven innocent".