Please choose one, your best example, and we'll discuss it.

I referenced a text book in my first post that fully supports what I have said. Here's another well-known reference where you will find this quote on page 499: "When clocks are synchronized according to the Einstein procedure the equality of the velocity of light in two opposite directions is trivial and cannot be the subject of an experiment." -- R. Mansouri & R.U. Sexl, A test theory of special relativity: I. Simultaneity and clock synchronization, General Relativity and Gravitation, Vol. 8, No. 7 (1977).