If you are serious about working on your own bow than you definitely need to buy a press. I started archery hunting four years ago and after seeing what the local pro shops offer I went and bought the best apple press and started to fix and adjust my own bow. Most of my learning came from trial and error and going to sites like this for advice. People like Pa. Matt, field 14, Pa. bowhunter, are a few that will take the time to help you out with any problem you may have. So far I haven't broke anything and I take pride in adjusting and repairing not only my bow but a few other people's bows.
Polack