Chris King headsets

he right. the headtube should be reamed and faced if you want chris king to warranty the headset.

you can, on some bikes, get away without doing it, but I wouldn't try that with a new headset, after all, if you are paying £100 for the thing may as well pay £10-£15 to install it properly

I have no idea what this means.... I used a block of wood and a hammer to install my headset btw.