Neal,
When I was at Takhli in 69-70 it was pretty common to be pulled for augmentee perimeter guard duty working with the Security Police. Many guys did that duty. I did it for a full month shortly after I arrived at Takhli. There was nothing in my records about it which is something that both shocked me and pissed me off. I did it and still have clear memory about that experience but there was nothing in my records.
I think I saw your email address post in another of your postings on this site. I've got a document I'll send you that should be some good evidence you can use concerning augmentees. It's something that you should definatly use in your claim process.