About the tech: Ingo Swann, the famous RV originator, has written a book "Psychic Sexuality", in which he describes a technique that the Mahatma's use for themselves and their disciples in temples in India.
Ingo also used it in a scientific setting (Elmer and Alyce Green, Menninger Foundation) and in no time (few days of two hours a day) it opened up his chackra's to such an extend that he could not turn it off. It took him a year to learn to control it. You have to read it for yourself (page 163) but here's the gist: on a north wall of a quiet room in a temple, the entire wall is covered with a metal sheet, mainly copper, polished. You sit on a little stool that is insulated from the ground/earth by a thick glass 'vessel'. Above the crown of your head, but not touching it, there is a strong magnet with the north pole up (females: south pole up). You start with gazing at the wall and then see what happens.
Also about the tech: I have had contact, a couple of times, with a very gifted clairvoyant. He used to sit under a kind of umbrella from copper. It was about 1 meter in diameter and suspended from the ceiling. He told me there was also silver and gold in it. The gold on top I remember. He had designed it himself. He said it improved his clairvoyance and he could use it to 'cleanse' himself. He is deceased now and stayed away from the 'spotlight'. So I have no more info than that about the 'umbrella'.