I just got my first Esterbrook desk pen. It's the kind with a lever-filler fountain pen and an "8-ball" holder. For now I'll assume that a picture would not help, as my question would be for people who are already familiar with this style.. The pen is apparently ready to go, new sac, good condition 2668 nib. I notice, however, that it sits loosely in the holder. Not ridiculously so, but there's none of the secure feeling I'm used to with a typical slip cap fountain pen. I also notice that there is no "inner cap" equivalent inside the pen holder. Is this normal? I don't have any other desk pens of this style, and I haven't inked this one yet. I'm just wondering if it will tend to dry out because there isn't a tight enough seal. Or maybe the fact that it's nib down will be enough. For those who have used these, do they fit tightly into the base, or is there some play?