Hi @Rodrigo, and thanks for your answer!
So, indeed, i've looked also at using snap / scrollToPlugin, but the problem isn't really "how" to scroll to, but how to do it to have precisely 2000px translateX on the #innerSlider element.
Because right now, it is impossible for me to accurately scroll to a certain element, since scrolling 2000px ends up with a final translateX value of 1757,...
What I'm trying to achieve : scroll in the slider, after 500ms, automatically scrollTo the closest element so it's "centered".
Let me know if it still isn't clear!