mik5- I never said there is any need to stam be mekabel shabbos 30 minutes early. That is just my person practice because I feel that it helps one prepares one’s mind for shabbos (and Shayim Mikra).
I also have a great deal of respect for Rav Chaim Kanievsky and his Psakim but that does not mean that you always have to be Choshesh to everything he says (especially when my Rebbeim have told me otherwise and when) many gedolei h’achronim say its muttar.