Is a headset tool necessary, or could I just use an adjustable wrench? Probably not the best idea, but I have heard of "home mechanics" doing this to save a little scratch. From what I can see, I pretty much have everything I need to do conversions, overhauls, etc. Typically, I only work on vintage/older road bikes. The only thing else I would like to have would be a wheels truing stand, but that may come down the road.