Wanted to mention the work of Keith Cantu which i have only now noticed – Sri Sabhapati Swami and the “Translocalization” of Śivarājayoga
https://escholarship.org/uc/item/48v5t1bc
The mention superior of Head Chakras in Sabhapathy’s works (and the numerous diagrams of the same) seem so suggestive. Its hard to imagine the Theosophical Head Chakras are completely unrelated to works such as this – or, rather, unrelated to existing Traditions which speculate on or embrace in practice the head chakras.