Seriouslty, what would Efren do?
This is a great article that explains his stroke much better than I could.
Let’s face it, if you are going to copy a grip in any cue-sport, then you absolutely must consider this one.
There are a lot on youtube and they all differ somewhat, as in everything in life there are beautiful nuggets of usefool knowledge in all of them (well maybe not all)
Not the same for everyone, but ultimately has to follow the same path.