odys1i- From what I know about PNG kavas, Madang Short, Madang Long, Isa, and Waeld Koniak are all different cultivars. BKH actually carried Madang Short and Madang Long in our infancy before we lost contact with the supplier. I believe most, if not all of the kava names you mentioned are listed in Lebot's book "Kava: The Pacific Elixir: The Definitive Guide to Its Ethnobotany, History, and Chemistry" in the section listing kavas from different parts of the world (I'd confirm but I loaned the book out). Funny thing is that sometimes the word "Koniak", which is what the farmers are calling this particular strain, is used to simply describe a strong kava in the PNG pidgin language, but in the case of this particular kava I'm leaning toward guessing it is Waeld Koniak. I plan to test it and if the kavalactone profile matches that of the Waeld Koniak listed by Lebot, or any other PNG kava for that matter, I'll know precisely what I have. Whatever it is, it will floor you. Definitely a kava to drink when you have no other pressing responsibilities.