I had a problem one time with another issue, and when the gun came back, the barrel ramp was highly polish and widened. I think I posted some pics at one time, but I'll try to find the before and after again.
4given , i feel your pain! I wanted to like the DB9. It Was sent in to fix trigger breaking and failure to feed. They fixed the trigger issue but the feed problem remained. I finally fixed the feed issue by replacing the mag springs. I would have 1 or 2 rounds jam every 2 or 3 mags. I did carry the gun for almost a year. I figured at the time I knew i would get off at least 1 round. Odds were in my favor for more.....But i always had the nagging doubt about fully trusting it. In the end, i purchased a Ruger LC9. It was only slightly bigger and just as easy to carry and more importantly it gave me piece of mind!Good Luck!
I also have the LC9s Pro, but had it come apart on me one time while shooting (Guide rod/spring fell apart and locked it up. No field fix). Ruger was quick to send me a new assembly, but I've never trusted it since. Staking on spring retainer end plates makes me nervous!