I bought my wife a gen 4 Model 19 last week. The return spring assembly is way too heavy compared to my Model 23 and my 1911 45 acp. It is a little uncomfortable for her to work the slide. She will only shoot about 3 to 4 hundred rounds a year in this gun. I'd like to replace the RSA with one with a lower poundage. When I was shooting competition with 1911's this was common practice. Are there any reasons why I shouldn't do this other then Glock knows what they are doing, don't mess with it? Who sells reduced poundage springs?