I had one. It is amazing what the drunken monkeys that assembled Century's CETMEs got way with. They actually shortened the mechanical life in order to get the things to work for a while.
Check on the 'net to see about their headspacing techniques. Mine worked fine and I traded it off while it still did. It had a zero problem that was too aggravating to deal with.
"Oh bother" said Pooh, as he punched the magazine release...
In some peoples minds "What if?" is just as real as What Is.
Think good thoughts about Ronny moving to the Netherlands ASAP