"When this issue first came up a few weeks ago, I called one of the owners of Superplug, whose name I have forgotten. He told me the Superplug for the Cummins was coming loose because when Superplug engineered the threads, they spec'd them to be too tight... . I believe they are in the process of re-engineering the plug for the Cummins. He said no other Superplug for any other application had ever loosened, and was extremely upset this had happened. "
Did he say anything about replacing the bad ones?