I just bought some Venus pen kits and I also pulled out some statesman kits which I have not made in a long time. I noticed something when I pulled up the instructions on these kits. Basically the same kit so basically the same instructions. But I noticed that on the black section of the centerband coupler there are grooves in the piece and they say it is for glue. My question is does anyone or everyone who makes these type kits add glue to that black ring and if so what glue are you using. When I remember making the statesman and gents I never glued that black section in because it was so tight to go in and many times I had to sand it some to get it to slide along with some vaseline on it. I tried the Venus kit and that black portion slides in easily in the tube. Hope this is making sense. Thanks in advance. What does the masses say?? Is there a problem with that piece twisting or breaking when screwing in the pen?? What am I missing??