I posed the same question in the WE Scar/M4 thread which is down a bit from this one. It starts on page 6
http://www.airsoftcanada.com/showthr...=130219&page=6
On my first post is a very helpful pictorial of the whole process. I did not have to cut anything off my spring. It is only if there is a little curly Q on the very end of the spring which would hinder getting the adjustment tool through. That was the only part that was confusing me.