Originally Posted by
3alarmer
Not sure what's going on with them now, but Chris King headsets used to require a special press fitting you bought from them for their headset installation. Otherwise you can hurt them.
I have a very early CK headset on my Redcay. Before I had a proper tool (I now have the Cyclus), I tried briefly with my homebrew threaded rod setup. Being aware of the "special fitting", I didn't try long before taking it to the LBS.