i have a few 3rd gens, some have buttery smooth decockers, while a few are rough and stiff. To be fully honest, I have swapped single sided levers into some of the rougher ones ( I prefer the thinner profile). I've seen the video outlining the polishing of the actual safety/decocking lever and sear release piece which i've done but with only limited results. Anyone have some other suggestions to smooth this action ?