Taken from Berea's manual .. Hope it helps Mark ..
6. Drill a 5/16” hole is a piece of wood to use as a press block.
7. Slide the stylus assembly into the small end of the finial. Place the finial over the hole you just drilled and press the stylus assembly into place. DO NOT press against the stylus tip. You will ruin it. Press this in until it protrudes out of the finial a short distance. Be careful here and check the pressing progress often to get the right length.
8. Now place the decorative ring over the stylus/finial assembly. Again, not that the ring is tapered and should be installed accordingly.
9. Now, using the same 5/16” hole you drill previously place the stylus tip in the hole and press the stylus/finial/clip assembly into one end of the short blank.
10. Slide the cap onto the pen and check it’s operation.
They also state this ..
One other word about pen parts. Occasionally, you will encounter parts that are a little loose fitting. This can be corrected by using a SMALL spot of glue, usually CA, on these parts before pressing them home.