I heard that the Bet HaLevi and the Peri Megadim hold that there is no Mitzva for a person to don Tefilin everyday. Can someone source these opinions and explain exactly what they are meaning to say?
What is the minimum width of tefillin straps? For example: if one's tefillin straps partially tore, how much is required to remain for the tefillin to remain Kosher?
What is the reason that the right strap is longer than the left strap by the Tefilin Shel Rosh?
How long are the Tefilin Shel Rosh straps supposed to be? What is the minimum Shiur and what is the maximum?