I am not quite ready to replace my recoil springs, but I want to have the knowledge when I do. Do I replace both springs on the guide rod or just the one. If both, how do I get the one off that is between the guide rod head and recoil spring plug? In the manual it says Kimber will replace both if sent to them. Is that necessary or is it something a somewhat novice user can do with out messing it up? Thanks in advance.