I own a 2009 F8 with a diamond drive and servicing the oil is very easy to do, but a buddy of mine has a 05 F7 with diamond drive and said the drain plug is in the tunnel and not sure where the fill is. So I looked up on line parts breakdown and I see the drain plug is indeed in tunnel (according to picture) but do not see fill, I roped myself into helping him with it so was hoping someone has done this and let me know where fill is and this sled does not have reverse so is the capacity still the 3oz like other diamond drives? Thanks!