The original design from https://www.printables.com/@MSTVS printed fine and fitted perfect.
However the end was too sharp for my taste, becoming a problem when I stored the iPad with the pencil on it in a bag.
So i reengineered the original idea, this time with a blunt end. Also it has a slightly better grip due to the flexible end.
The author remixed this model.
I did not like the sharp end. So I took the idea but redesigned from scratch