I removed my switch assembly and during he process mildly scratched the plastic faceplate. I am considering replacing the plastic faceplate but to do so requires removing the small knobs at the end of the contol levers. I remember as a high school kid driving these cars that when those knobs fell off they were very hard to re install and stay installed. The knobs are on really secure now so my question is risk breaking the factory install of the knobs to replace a mildly scratched face plate or leave well enough alone?