Hi Michou,
See the post from @Ampan in this thread, as well as the responses to it. Another post you might find interesting is this one from @Silverdragon .
Both posts discuss a method of dealing with the problem of pacing, which I think is what you’re after.
As Amber mentions upthread, Scrivener offers some unique tools for handling this, which these posters (and I) use with the Save the Cat beat sheet approach to plotting. I believe this method would apply to any approach to plot structure.
Best,
Jim