I have learned it can be a double edged sword. You either take care of things once and for all or you add more headaches because once you put everything back together from doing just one thing, and if something doesnt work then you have all these other things you did to consider as possible suspects. However, I have yet had that happen to me but I take a great deal of time when I do most work on my car and particularly with electrical stuff to try and keep that from happening.