The duties of a Hebrew Scribe or Sofer have kept the Torah Scroll .00004 error free for 3,500 years. There are only six Hebrew letters in question.
A Job for a Sofer Jewish Book Council
What are the job qualifications to handwrite Torah scrolls for use
Sofer On Site International
The duties of a Hebrew Scribe or Sofer
To Describe a Scribe, Reuven Chaim Klein
The Torah My Jewish Learning
SCRIBES
Moses Sofer - Wikipedia
The Power of the Scribe
What is Torah? A translation of the mind of God - The Jerusalem Post
Sofer - Alchetron, The Free Social Encyclopedia
Sacred scribe hi-res stock photography and images - Alamy
Torah Scribe, Jaffa, Micha Bar-Am; Publisher: Photographic Publishers International
Recent Acquisition: Sefer Torah Scroll Fragments