Here is a video of how you can remove the needle bar when it's not sliding smoothly or stuck:
https://drive.google.com/file/d/1_nvgnIRJaVw0DYBHs3CYULzTUGf3nKpr/view
Needle bar stuck
Here is a video of how you can remove the needle bar when it's not sliding smoothly or stuck:
https://drive.google.com/file/d/1_nvgnIRJaVw0DYBHs3CYULzTUGf3nKpr/view