This seems to be a running theme, but the course files don't seem to match the course at hand. The frames in the video do not match the frames in the file. There aren't any markers, so referring go to a marker becomes pointless. Difficult tut to follow because your mind is always having to work out the difference between what is being said and shown in the video. This makes it difficult to focus on what your suppose to be learning. Perhaps, the file can be updated for future students?