and i have one question... am i supposed to put some oil in this thing before i install it for the first time?? it is brand new, and nowhere on the instruction sheet does it mention oiling the inside of the DV. it only says to apply some oil on the nozzles but only for the hoses to slide on smooth and easy. doesn't mention anything about lubing up the inside though. basically in installed it just the way it came in the box. anyone know if i was supposed to grease it up first?