Greetings Edman,
Please excuse the long delay in responding to your post.
Putting things up for the winter has made me neglectful, and of course taken me away from this " Great Forum". I usually don't post unless I have something meaningful to say!
Your move to have a sighted R9 was a good one, as you are aware by the previous post I had the same concern myself. The R9s is a awesome little handgun, and the accuracy is uncanny, I'm affiliated with many full time shooters and all that have fired my R9s could not believe how accurate it was.
I have had my R9s since mid July and have fired over 500 rounds through it, myself and friends together that is.
I had did a report after the first 300 rounds, and had only 3 malfunctions and two of those were most probably my fault ( rounds not push tight against the mag wall and possibly releasing the mag while gripping the pistol. But.... but.... after changing out the spring after the first 400 rounds I've had many FTF, and numerous jamming problems. The feed ramp is polished like a mirror, and it seems to do this regardless of the ammo that I am using, so I'm a bit concerned about the reliability of my " PUP" . I will go back to the original spring and see if the problem still exist.
I also might mention that I did the " Drop Test " with my R9s ... ( unintentionally ) I was accustomed to carrying the Pup in a DeSantis front pocket or RJ,s rear pocket holster, and I purchased a Kydex paddle, and had begun to carry it in that mode,........well..... to make a long story short after arising from the pot I stood up and the Pup went flying out of the paddle and hit the tile floor with a loud noise ( which my wife heard from the other room ) other than the chip taken out of the tile, there was no damage to the pup at all, I immediately went out back and emptied the mag that was in the gun and it fired flawlessly, this was of course with the first and original spring. And that sick feeling in the pit of the stomach subsided, man was I ever scared! The Pup is now place on the counter before I even think of doing any other business