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.
This is John P. Painter. I do not represent my self as a teacher of Tibetan Gtumo. I only say that I learned the methods and practice them myself. I do however teach a Daoist method that allows one to heat the body internally however it is quite different from Tibetan Gtumo practice. I would never disrespect Thrangu Rinpoche by claiming to be a lineage holder in his methods.I hope this clears up the misconception. And Biff is my name it appears on my birth certificate as John P. Biff Painter.