Oy vey…
“It was instituted by one of the gedolei hador who, in his expertise in all areas of Torah, decided which is the most accurate way to daven.”
Then…
“No one is telling you to daven the nusach that I do. “Because” should be enough to let you know that I have a good reason. It should also be enough to tell you that I don’t want you to know what that reason is.”
No, sorry, this makes no sense. In effect, you are placing a stumbling block in front of all of us in regard to tefillah if, in fact, it is the most accurate way to daven. Others ahve posted about the proper way to bow during oseh shalom and other correct ways of doing things. If we are not davening the most accurate nusach then I would hope you would enlighten us or at least let us know the Gadol Ha-Dor to whom you refer. I am not judging or inquiring for no reason. i take tefilah very seriously and if I am making a mistake or doing something incorrectly, I would like to fix it or at least ask my Rav if there is validity.