But it is something that is nice to know, should your axle break you could fix it yourself, to me it knowledge that is beneficial and if you have spare time you can do gearwork on CL and make some extra money to pay for more parts or to recover you new tools expense.Having the tools is one thing.....knowing how to use them and set the gears up is another.
Gear work is brain damage IMOP. It will take you 4-6 hrs PER set if you are lucky and have all the shimms, and tool, and know what you are doing. Not to mention $300 in tools.
Unless you plan on doing your axles, your buddies axles, and 14 other axles....I would just have them done. Gearwork can be found pretty cheap on Craiglist :cheers2: