Hi I am interested in some Nature's Garden FOs in Australia. I can get them from Kody's or Big Tree. Taking an example of Butt Naked Kody's are half the price of Big Tree. But Kody's says use at 5-7% for soap and Big Tree says 3%. NG says use at 5% for soap. Has anyone had experience with these suppliers? Is it worth paying more or is just a matter of how they report their findings?