What RPM say: "The certificate with each disc guarantees that this printed Tane Mahuta PDGA approved RPM MR1 (6 6 -3 0) disc is an authentic limited edition original, designed by Bros for Change."
 
The Piwakawaka (Maori for "Fantail") is a beautifully controllable, and forgiving midrange disc. Simon outdid himself with the Piwakawaka; creating a disc which is not only ideal for beginners, as a first disc, but it useful for easily controlled upshots, hyzer-flips, and anhyzers thrown by advanced players.
 
About Tāne Mahuta
In Māori mythology, Tāne (also called Tāne-mahuta, Tāne-nui-a-Rangi, and Tāne-te-waiora) is the god of forests and of birds, and the son of Ranginui and Papatūānuku, the sky father and the earth mother, who used to lie in a tight embrace where their many children lived in the darkness between them.

The children of Rangi and Papa grew frustrated at their confinement in the cramped space between their parents. Tū, future god of war, proposes that they should kill their parents. But Tāne Mahuta disagrees, suggesting that it is better to separate them, sending Rangi into the sky and leaving Papa below to care for them. Tāne's brothers Rongo, then Tangaroa, Haumia-tiketike and Tū all try in vain to separate the parents. After many tries, Tāne lies on his back and pushes with his strong legs, and finally forces his parents apart, and Rangi rises high into the heavens. Then Tāne searched for heavenly bodies as lights so that his father would be appropriately dressed. He obtained the stars and threw them up, along with the Moon and the Sun. At last Rangi looked handsome.