Not much to say. I haven't given up, but I got frustrated and annoyed, so I decided to take a different approach. I kept the book on the nightstand next to my side of the bed as a gentle reminder that this isn't over, but I gave up doing all the exercises.
About 3 nights ago (maybe Monday or Tuesday - I should have written about it the next day), I woke up sometime while it was still dark with the vibrations. I'm almost completely certain that I was awake, mostly because I remember all the things I was thinking about at the time, which is something that never happens when I dream. I debated trying to reach over and wake up my wife, hoping that she would wonder why I was vibrating. Then I figured that I'm not really shaking the whole bed, it's just some internal thing, so she would just think I was nuts.
I tried to just let it get stronger and stronger. I think I was so pleased that it was happening that I focused too hard, and after a couple of cycles of stronger and weaker vibrations, it stopped.
I'm hoping it happens more.