Reply To: Interesting Customs on Pesach

I’ve been told that the Chazon Ish considered the MB to be the mainstay of Halacha, but this view does seem to be the standard even amongst non-ChazonIshniks.

Yes, but the Chazon Ish holds differently from the MB on a number of issues:

According to the Chazon Ish, you cannot daven Mincha after shkia, even b’dieved. You must finish SE before shkia.
According to the Chazon Ish, you cannot kick a muktzah object or move it with your elbow; the Mishna Berura allows this.
According to the Chazon Ish, you can say Vayechulu by yourself Fri night; the minhag is that we say it with a minyan, or at least with one other person.
The Chazon Ish has really big shiurim for reviis, kezayis….