Last year I bought a 4" S&W Model 29-2 back from a friend. I'd sold it to him about ten years ago when I was out of work and needed money. It had a defective forcing cone from the factory when I'd bought it used the first time, around '83. My friend didn't have the money to get it fixed and didn't want to get his name attached to it by sending it to S&W to be fixed.
After getting it back, I tried to get the forcing cone fixed by the guy who works on my guns. He was able to improve it, but couldn't completely fix it, since he needed a lathe to turn back the barrel hood, after the forcing cone was recut. I ended up sending the gun to S&W, who fixed the forcing cone and put a deep cut on the outside of the barrel in the process. To make a long story short, I had to threaten to sue them before they replaced the barrel and refinished the gun, which of course rendered it all but worthless. All of that took very nearly six months and pretty much took all of the enjoyment out of getting the gun back.