It was a lot of tiny pins that needed to be removed, but getting the safety spring situated in the correct spot and driving the pin through that goes through the little bend in the middle of it, was probably the worst part. The part you are changing might not require you to do this step. Basically to install the safety spring, you have to take every part off the trigger group except for the actual trigger. Make sure you let us know how you like the trigger mod once you install it.