Well...if ever I needed confirmation about needing to change recoil springs...
As of Saturday, I had put a little over 2800 rounds through my RAMI - w. the original spring assembly. Slide return had slowed down enough so that, instead of a solid "snap," I was getting more of a "ker-chunk" (yes, I could feel the difference) and one failure to go into battery. Spring now replaced and I ran IDPA w. the RAMI last evening. Zero issues and the "snap" is back!