JB-Man,
I dont think keeping your 1911 condition 1 all or most of the time will wear the mainspring out at all. I am not any kind of gunsmith, but my 1911's 17 years old and its been condition 1 more than at rest the entire time and it still goes bang every time I want it to. Plus think of all the old 45's that they sell, people go shoot them. I hear about people replacing mainsprings, but it always is cause they want a flat housing, or lighter pull, never cause its worn out or giving them trouble.