I am not talking about Precession of the Equinoxes. Procession of the Equinoxes is a slow Precession based-upon the steady, distant forces of gravitation.
No, it's not.
Precession of the Equinoxes is a modern theory which is only about 2000 years old. It has never been proven because no one can verify whether this phenomenon actually was occurring 26000 years ago. Gravity is the only one of the four major forces which is still unproven.
Look at the illustration on Wikihow for how to find North without a compass, Method Four of Eight: Using the Stars: Equator. The 50-degree angle is what we measure nowadays when we go back to 10,500 BC in a planitarium. That is because the earth's axis has been changed 12-degrees.
No, it hasn't.
The Angle of Obliquity only changes 2.5 degrees over 41000 years.
When the Core of the Great Pyramid was built, the angle was nearly 38-degrees (not 50-degrees).
No, it wasn't. You have no proof of this at all.
You are totally confused.