I really enjoyed this level coming from a technical background this level goes through the various stages of taking the movement apart, what to look for and the cleaning process.
The first time I disassembled the watch movement I was quite nervous but what I found was the easy, clear steps to follow steps with both video/literature I managed to complete the task.
Must to my amazement and joy when assembled the movement started working. I’ve done a few now and I’m really impressed the level of confidence you get.
Best of all if your not sure you can always go back for reference which is something of a rarity these days.