KOTZO D'ALEPH: New Letter from Vaad Mishemeres Stam
Kotzo D'aleph. It's Kaballistic significance is gaining recognition (as per the above letter), and is important that sofrim and magihim read the above.
On the topic of Kaballistic hiddurim, I have heard from countless sofrim and Rabonnim the Kaballistic importance of the right side of the choteteres of the ches, that it should be thicker and more prominent than the left. (This is seen in many choshever older ksovim and brought down explicitly in Shulchan Oruch Harav, so IMHO also very significant.)
Secondly, it's important to keep things in perspective : Kaballistic hiddurim are certainly important. However the primary concern for a magiha is that people should have Kosher stam. Shulchan Oruch comes first. It seems that some magihim put an inproportiantely greater emphasis on lengthening tagei lamed, yet seem less interested in fundemental halachic repairs that are of far greater significance and concern. Just saying...