Clyde put the o-ring back on the brass connector if you have it off. Make sure when you tighten the brass connector down you tighten it as tight as you can get it by hand. If done right the o-ring will look compressed a bit. If it's on tight enough when you go to take it off again you'll have to use a towel or something to get it off.
I already use a towel to get it....oh, wait, sorry.
I'll keep monitoring it today to see if that just wasn't the filling up atty leakage earlier. When it was acting up before, it would misbehave a few hours after I assembled it. It it leaks later on, I'll dump the juice and try the brass o ring then.
So, cartos at 3.7 or 6v today? I honestly can't decide....