I have fairly early 22/45 (nylon frame) 228 range serial number. It has been nothing but trouble for some while. Fail to eject, stovepipe, stoppage on top of stoppage. I have never had this problem with any of my other MK series pistols. Multiple cleaning and inspections, new Ruger supplied mags, and I have found nothing wrong that I can identify. So I sent it back to Ruger this week. What kind of experience has anyone had with customer service on these older 22/45s?