Great guide mate, much clearer and more detailed than the other one!
Can't really think of anything critical to say other than it might be worth linking to this thread under the corner mastering trophy: The Official Tracks/Corners Mastering thread
You've already mentioned using the Golf, which is good. But there are a few corners in the game where you need to make your own racing line in order to achieve, as the green line on the track is sometimes wrong, annoyingly. You might want to add a tip saying something like "if you're struggling with any corners, have a look through this thread, or try turning off the racing line and using the tyre marks as a guide."