Okay, I took my bike to the LBS to get my headset pressed but on my second and "play" bike I decided to to it myself. I installed the headset without any problems with a piece of wood and a hammer. Some may cringe at this but I didn't want to spend a lot of money to build this up, because I already spent way to much on my other bike. Soooo, my question is how do you know when you need to face your headtube? Is it something that needs to be done with each new headset or a new frame or what?