I should have mentioned that this is a technique for in the middle of the night, not first thing when you go to bed, for REM reasons. Probably everybody knew that.
I'd assumed that, but good to know. I've been trying the SSILD technique lately, too. Hasn't produced any LDs, but it does sometimes produce (or, more likely, allow me to notice) HI, which I don't recall ever noticing before. Doesn't ever work when I first go to sleep, even though I've tried it a lot just for fun. Only works after waking up and going back to bed.