I was plugging some SLVR Cardas conectors into my HK to test them out, the connectors were oxidized, but I didnt think silver oxide was anything bad, I noticed that the grip was temendous, possibly friction to to oxide, and when I pulled out the connector it took out the ground ring from the female RCA jack along with it luckily they were from ports I didnt need and I was test the connectors. Should I be concerned with fire hazard or safety issues now with the amp since the Ground rings are tore out? I plan to upgrade to a better receiver in the future. but im kind of scared to use these connectors now. I quickly headed over to radio shack and picked up some dexit pro and gold, and cleaned them. They seem to fit better, but the grip is still super strong with these connectors is this just an inherent design with cardas plugs?