I remain uncertain about “Biff Painter“.
I half expected him to ignore my query, but I got a clearish answer:
I first learned Gtumo as a Daoist inner heat practice from Li, Long Dao of Sichuan then later from Lama Trangu Rinpoche the Tibetan version of Gtumo practice, Medicine Buddha meditations and Mantra and Chod Ritual. This took place in various locations beginning with his visit to my school many, many years ago. I am afraid I was a very poor student.
And we see that he really did meet Thrangu Rinpoche once at least:
What is a little disturbing about all this is that he presents himself as a teacher of tummo without any apparent approval or direction from Thrangu Rinpoche (or anyone else who might be characterised as a lineage holder of these secret teachings ). Does a “very poor student ” (humility aside ) qualify one to set oneself up as a teacher.