I wrote a Tattva Vision program which, as far as I can tell, is supposed to be the use of the tattva symbols for the training of visualisation for the nominal purpose of astral projection. More research is needed.
Personally I’m going to use it for meditative practice and see how far I can get in training my mind to visualise what I want it to rather than whatever it feels like it wants to. I think this might help me sleep.
I’ll report back on how I get on with it.