Well color me blind VAPNJ and DWCraig. All I had to do was put my glasses on 
You are absolutely correct of course and I feel a little embarrassed here.
Indeed, the small inner o-ring on the bottom looks a little chewed. I can see now
how this all works but needed a magnifying glass to make sure. Good tip about
the carto end plastic.
Wish there was some way of making VAPNJ stickies for this thread

You are absolutely correct of course and I feel a little embarrassed here.
Indeed, the small inner o-ring on the bottom looks a little chewed. I can see now
how this all works but needed a magnifying glass to make sure. Good tip about
the carto end plastic.
Wish there was some way of making VAPNJ stickies for this thread