I tested YS New Sextant mod both in v2.2.9 and 2.2.10 versions and those CTDs on initial single mission/campaign gamesave loading are present there as well. Debuger reports that CTDs are caused by some errors in .py scripts., pretty much the same as in the latest TWoS version...
However, once the game is loaded it seems that there are no further gameplay and stability related problems, just as you said in your video...
I'll investigate this further but I'll probably need help from someone with pyton scripts knowledge .
The tests are done both with and without your polaris/stars.txt enhancement, it seems there are no difference there...
