is indeed a big old lump, i would have gone for a fender but alas can't drive manuals any more, due to multiple back surgeries has destroyed the strength in my left ankle
my D3 only locks the centre diff and also has the terrain response system, with all its different setting , mud, snow, rocks , sand
theres an optional rear diff locker but to add it is silly money and in all honesty for what i'm going to use the disco for wouldn't be bothered adding one
in its current form is good to know though i won't loose traction if i get a cross axle situation
but seen how well a fender copes off road so always admired them in there capability , will be interesting to see how well my disco copes off road, alas previously owning a hippo i hope that this will be more capable