Max, mind if I ask which card wallet you use? I also have a Fisher bullet pen but it's tough to find in my pocket when everything else in there is metal keys. It used to fit in the top section of an all-ett but they apparently aren't all made with the same dimensions and my new all-ett won't hold the pen.
I have one on order, what sold me is that it takes Pilot G2 refills as well as Montblanc rollerball refills.Machine Era solid brass
Not "super nice", but I like it