Are you still practicing them?
I listen to them whenever I have trouble sleeping. Inevitably one of two things happens: either I fall asleep, or I end up in an expanded state—and either option is fine with me.
I have the impression that Fehmi was disappointed that he didn't win more people over to becoming serious practitioners. People would resort to his stuff when they were stressed or in pain, but wouldn't necessarily practice it every day.
My father taught me an "instasleep" system that may(?) be related: basically you start distally and work proximally, becoming aware of any tension in body parts and allowing them to relax. When I do it I feel "myself" kind of "diffusing" to meet my environment, like fresh and salt water meeting to form a brackish zone, sometimes with a rocking sensation, and I usually fall asleep well before getting to core muscles. (when I was younger, people used to ask "how can you fall asleep on rocks?" to which I replied "you have to choose the comfortable ones", but it was likely more this technique)
The oddest thing about this technique is the source: although it sounds very Baba Cool, he'd been taught it in Uncle Sam's service.