Perhaps the fault is with us. We are not ready
Those who have reached a certain level Learn one thing – that spiritual injunctions of not revealing things is a must. Do their blogs will say a few things but not directly
Yogananda did not say much about kriya yoga. Yes he told a few things verbally and it has spread around – yet many things associated with it has not surfaced
Vivekananda said even less
So many people cone looking for answers of jyoti midrange, khechari, shambhavi and aum techniques. But only a real guru can give it. My blogs don’t have it. So easier for everyone to pursue it elsewhere.
Sorry.
Good luck on your search
Bhavin