I don't know the official answer but i put mine in dry. They were quit tight on tolerance so i chilled the legs in the freezer and slipped them in. Bolts i used thread lock and i think i did around 10NM. but they might take more. as i said i don't know the official answer.
I took the legs out of the crown, and very carefully roughed up the surface on the legs. This helps build a bit of friction when in the crown. A little loctite won't hurt. Used sparingly mind