Great course for learning how to service a movement
I like this course a lot, there are great information and it will be great in the future to look stuff up.
A minor thing is however the editing of the videos, a lot of the video has long segments where Mark is not saying anything, or where Mark is doing something off camera, which leaves the viewer just stuck waiting for something to happen. I would suggest to either add some commentary or cut out those “useless” segments.
I do think this level should include a part about automatic watches and those parts.