There is an expression in Spanish----"buscando la quinta pata del gato". Literally that is "looking for the fifth leg of a cat".
I was told that pretty often by a professor and mentor of mine. The point is that you are looking for something that isn't there or doesn't matter. Now I am not trying to disparage deeper investigation and study, but experience has shown me that sometimes it is best to act and take further studies as they come.
My advice is to do the PB bit as it can be done for where you are and at the best of your capability. While the good things are working for you, continue research if you wish.
Tayatha om bekandze
Bekandze maha bekandze
Randza samu gate soha