When first activating the revision slider, the tutorial automatically pops up, preventing me from interacting with the slider. I personally tend to want to interact with and explore a new feature, and only then look at the tutorial.
Making it easier to close the tutorial would help (e.g. my making it close when clicking outside the popup), but then it needs to be very obvious where to find it again (e.g. using an animation that shows the popup being "slurped" into the (?) button.