Everyone's mouth and teeth are different. There is no way one can impose a standard embouchure placement because everyone is different. A good teacher will know that. I have run into problems sometimes as a teacher sometimes because people want to know what my teaching "style" is, and my reply is that I evaluate each student individually and tailor things accordingly. The only constant is that there is no constant, other than breathing and relaxation and moving air.

Michael McLaughlin

Let us make a special effort to stop communicating with each other, so we can have some conversation.
Mark Twain