I've effectively turned my Kimber into a Series I...I think. Is there any adjustment I need to make to firing pin spring now that the passive safety isn't there? Did Kimber lower the power of the spring? I don't want to sneeze and have it go boom.
You shouldn't have any problems, the plunger spring is pretty weak. The next time you order a recoil spring, buy one that comes with the extra strength firing pin spring (like a Wolff spring) and replace the one that's in there if you are concerned about it.