Interesting question and answer on Facebook concerning different versions of A Course in Miracles where Lency Spezzano states "I read the Ur text - the original before Helen did a lot of editing. Other than that I am aware of only the official version."
I wonder if the same answer holds true for other Psychology of Vision followers?
A group that teaches and studies ACIM put together a textual history of the work outlining four major versions in What Are The Different Versions of ACIM People Study?
https://www.miracles-course.org/index.php?option=com_content&view=article&id=211:what-are-the-different-versions-of-acim&catid=93:questions-about-the-a-course-in-miracles-teaching&Itemid=41
