Greg, the degasing valve and tool work on my 2078 and 2078B with the bolt closed. Go figure. Had to bend the handle so it would clear the scope.
I've never heard of the "S".
Also Tim, I hope I am not hi j acking this member's thread. Hopefully not since we are talking about the same manufacturer and related AG's....... If so, I apologize and will start another thread if needed. I mod and admin other forums (not AG associated) and the last thing I would do is interfere with, or violate, the forum rules. This is an older post so hopefully I'm not out of line here. Thanks.