Daas,
That’s actually not as easy as it sounds. Most people either hold of Rabbeinu Tam’s definition of Shkia or they don’t. Some are Machmir on Shabbos not to do Melacha, but otherwise it’s usually not just a Chumra.
I’m not sure how easy it sounded, but I’ll explain; if you hold like ?”? ????? ????, you might still try to daven before the earlier ?????. If you hold like the ??????, you can’t rely on the later ?????.