One of the reasons that the silicone o ring could have been popped into the CC (cartridge converter) is that you arent putting the CC into the pen properly if you feel the CC that there are 2 little nubs on the side on opposite sides of it and those go into the little mouth bits inside the grip section not the large U shaped bit and when you put them in the thin grip parts you will feel it click firmyly in place where the big U will not ...when you put them in the large U part it pushes the nipple inside the grip section too far into the CC therefore displacing the CC's O ring that goes inside the grip section ..HOpe that helps :)
Actually, but two of the rubber grip pieces in case you need to grab a pen and another part of it. I have small tackle boxes with pen tools, ink cartridges, pen parts, in them. Love the Cross Wanderlust pen! I remember when they came out, and I looked at them, but hadn’t yet used the Classic Century that I won in an auction. And, I love the blue inks!
Grateful I have a son into fountain pens so I can say “Here, fix this please!“ as the thought of doing the repairs gives me hives. lol. I love all the beauty after the repairs tho, of the words envisioning a “mood creator“ and “summer blues“ and I think that might be an Emma or is it an older Buttered Rum journal? 😍