I am sure those big into Septuagintal studies already know about this, but there is a new edition of the Rahlfs version coming out. It seems that not a lot of people know much about it other than it is has lot of corrections in it. I'm not sure if these changes are major or typographical or what.....

https://www.eisenbrauns.com/ECOM/_1TT0XQ8S6.HTM