Hi Trevor -- I see you joined today. Welcome.
I don't know if you have any pen assesmbly experience yet or not, but you may need some more information to make sense out of what everyone has been telling you. I'd suggest to start with the library articles, videos on Youtube, and even some of the instruction sheets that the suppliers provide with their "slimline" line of pens. Here's a "Penturning 101" section of the library that is a good starting place:
http://www.penturners.org/forum/f139/iap-library-penturning-101-start-here-90772/
If I misunderstood your experience level, here's a library article that helps explain one way to take the "guts" of the pen apart.
http://content.penturners.org/library/tools_and_jigs/A_SIMPLE_7MM_DISASSEMBLY_TOOL.pdf
I'm sure there are several Youtube videos showing the same procedure. I can't search Youtube from work, but try searching for "disassemble slimline pen" or something similar.
If you ruin the existing transmission trying to knock it out, here's one source:
Pen Parts | Page 1 of 1
just scroll down the page and look for the 7mm Twist Mechanisms.
another option is to buy a "slimline" pen kit from any of the various suppliers, and only use the transmission out of one of them. A little pricier, but if you have a local store, it might be less expensive than paying shipping.
After you knock out the nib, then the transmission, press the nib back in place, then press the transmission back in (or new transmission) slowly - test fit with the ink refill - press in "just a hair more" - test fit with the ink refill -- press in "just a half-a-hair more" -- test fit with ink refill........
There is alot to learn if you are new at this, so I'd spend some more time reading articles before knocking your pen apart. Another idea would be to talk to your dad's friend, and see if he can give you some instruction time. He might even have the right tools to help you adjust this pen.
There's lots of help out there, and depending on where in Louisiana you are, there's probably some fairly local help not far away.
Good luck.
John