As I said to Rainbow Spirit in the logs and in private via the website, congratulations on the find
I was hoping when I was at Bifrost GZ there would be a few more cachers there I could "team up" with and see if they had any ideas as to where it's hidden, however reading the back story of the cache itself and their other "hides" I've got a few more ideas where it's hidden .. will return once again to put those theories to the test as my prior ones failed!.