On Tefilin For A Left-handed Man, Chalitzah For a Left-footed Man and The Name Binyomin (B'inyan Chalitzah B'regel Smoil U'b'din Itar Yad B'tefilin V'itar Regel L'avoidah, Parshas Vayishlach & Teshuvos RA''E Siman 122)