I discovered the Septuagint a few years ago and find it even more informative than the KJV. The Greeks were more descriptive than Hebrew and the meaning was decided on by Jews and the proper Greek was chosen. If you are into prophesy in the Last days, the Septuagint is more descriptive and accurate. An example would be Amos 7:1 speaks of the king's mowings. Well, the king spoken of was Gog which the KJV doesn't speak of. There are many changes in Genesis that tell you more in the Septuagint than KJV.
Wouldn’t you have to know Greek to read the Septuagint?
The Greek texts from which everyone works are translations — the Old testament was created (whether written down or not) in Hebrew, and the words of Jesus were spoken in Aramaic. Every translator af anything makes editorial decisions.