I really think it’s worthwile to follow Mark’s courses in their entirety from 1 upwards. Even if you’ve clocked up your YouTube hours, I bet there is still something you can learn from the first level course. He really starts almost as if you’ve never seen a watch before…but if you’re here, it’s likely you’re fairly familiar with the main components…I almost guarentee that you will still take away some new information from this level. Also great to help you get a shortlist of the really necessary tools and where cheaper alternaitives for beginners can play a part.