I’m having trouble distinguishing between the front and rear sights of S&W DK1911. In my opinion the indoor range at the club is pretty dark, we have adjustable lighting but I still have trouble seeing the sights. Three dots combat sights work well and so don’t red ramp white outline on my S&W revolvers. My gun smith machined a new red insert into the front post and that helped a little, any thoughts for a rear sight fix without painting them?