How to cut Tefillin Retzuah / Retzuos / straps. Why are they cut on an angle?! Can I do it myself?

Cutting Tefillin Retzuos / straps, Do they have to be cut on an angle? Can I cut them myself? To learn more about Retzuos watch this video    • The Ultimate Guide to Buying / Purchasing ...   If you are looking to purchase Tefilin Retzuos you can do so through my website at https://www.thesofercenter.com/store/... How wide do Retzuos need to be? / Tearing Retzuos    • Are ripped / torn / cracked Tefillin Retzu...   Difference between Rashi and Rabbeinu Tam Tefillin.    • Why the Difference between Rashi and Rabbe...   0:00 Introduction 1:43 Why are they cut on an angle? 4:44 Can I cut them myself? 5:30 How much longer should the right side Tefillin Shel Rosh Strap be longer than the left?