I can't speak for the 440s but I have older hugi 240s and new dt 240s and they appear to be mechanically identical.
I believe the engagement upgrade applies to those hubs too, but I would certainly double checkclimbingbubba said:ok just wanted to make sure.
My friend was telling me of a part you could put in to dt swiss hubs and it gives it more engagement. puts it up there with the chris kings and such. He has done it to his 240's.