I have a Model 19 that I purchased in 1970. I used it for about a year when I first got it then it was stored for the next 40+ years. Recently started shooting it again. I have never taken the side plate off and cleaned and oiled the mechanisms. I saw a you tube on how to do it but it looks like it is not real easy to get the side cover plate off. Should I do this or just let well enough alone? Thinking that the cleaning and oiling might make the trigger pull even better ?