FYI this has been discussed ad nauseum here on the forum. Try a google search instead of the forums built in search. Try
this link and look at the syntax of the search (you just add site:m3post.com to the end of your search).
The quick answer is that EDC does not care what springs you use. Although the damping rates are optimized for the existing springs as long as your springs are not unrealistically short or stiff all will be fine.