I just double checked the STL's they look correct. I have an easy test though. the back part where you took out the bearing is different between the two files. I paused your video and went frame by frame but it wasn't clear enough to see. The IE version doesn't have a rounded edge on that inner back face and it measures 3mm thick. The other version is 5mm thick and is rounded on the inner edge all the way around.
Let me know