Durablue from 400ex on 450r?

[Jonas]

What exactly do you need to do to fit a 400ex durablue to a 450r. I am also interested in hearing feedback on anyone who has had theirs in for awhile.

[Jonas]

I know there are people out there that have done this but I'm curious about the details and wheather it has held up.

[kgbg]

You need a 250R collar (the splined sleeve that you thread the lock nut on to) and thats it.
I have had one on since January and its fine. It has done nothing. I have a X-33.