Originally Posted by
FBinNY
It's mainly a question of good use of time.
Instead of crapping around with more tools, ie. a wrench for the lockout, and trying to tighten it while holding the fork, you can simply use the pipe you need anyway as a slide hammer and be done.
Plus the slide hammer method offers positive confirmation that the crown is seated via a change in the sound.
This is the method I've always used without fail. Just tap it on by sliding the pipe up and down. It doesn't take much force.