Yes there is only one extra thing to the tech of the flame in throat visualisation that is
very important, if u want it to work.
Not just visualize the flame at your throat but make that spot as your visualisation
and foccussing spot of your breathing.
So focus your breathing there also else the tech will work way and way less!
So imagine that your breathing begind and ends there!

I have everytime i use it a ld in the morning.
But talent for it is also needed its not just a tech.
Often ppl dont like to admit that or talk about that but its the truth.
So its not like theoretical you know how to do it and whammo you should
or can do it. But give it a try for some time and you will find out if the tech
fits you like a shoe or not