I've been using some beats.
I do feel that my spine has elongated along with my legs. On top of listening to those beats I do some stretches but nothing too major.
I know these beats can be seen as a strange thing but hey, it's a PE forum (and more) so I feel quite alright by linking this stuff. The videos are free anyway, just like a lot of PE information is free on MoS.
I haven't measured my height in a while but I'm starting to feel that there's something to these beats. I mean, there a lots of expensive subliminal programs around and people have reported of success with those.
When a product is free or moderately priced it can take a while for the human mind to understand the possibilities.
I feel at times we might hard-wired to a thought "expensive is better and will produce results", when even the most expensive equipment won't help if you don't put it into use.
This doesn't mean that you should seek for the cheapest option as that can make you buy twice.
Just few thoughts ...
I might have a PDF file of height manipulation, I'll check my drives.