I agree it's nickable, though this can be moderated by adding hasps on the racks. I carry various bits on the outside of my Landy - shovel, pick, sand ladders, whatever's on the roof etc, and my parking etc can be adapted to suit the location and security factors.
Id always go for jerry cans rather than an extra internal tank of anything bigger than about 50l - should the car get stuck or need jacking (eg wheelchange), jerry cans can be taken out for weight constraints, a big plumbed-in tank can't.
The width thing is a good point... Ill have to get the tape measure out. I have brush wires on my machine and this has resulted in attention from the local ploddery back in the UK, but only of the positive (interested) kind!
(Costwise.... jerry can racks 60LE each in Gizeh in Cairo (any decent welder could make them in Europe) that's about 8 quid a throw, well made too.... jerry cans a fiver a pop at Billing, make sure you pick a good one! Altogether 52 quid - on the other hand I got a stainless 50 litre underseat tank the other day for 150 quid ....)
[This message has been edited by LandRoverNomad (edited 06 November 2002).]
Take nothing but photographs, leave nothing but wheeltracks..... tread lightly.