During my time in the Army I've seen many types of vehicle modified to suit the crew, especially REME fitter trucks, CQMS, SQMS etc, whether it's a Bedford, Leyland Daf, RB44 or whatever the unit trucks are. Illegal mods can take many forms from fitting cigarette lighter plugs for charging mobile phones, fitting beds, cooking areas, 24v to 240v inverters for powering TV's, Kettles,Playstations, Laptops, charging PSP's etc etc. During tours of Bosnia, Kosovo etc our metalsmith would build cages to house TV and DVD players which would be semi permenantly fitted to our Bedfords.
A vehicles were a little harder to modifiy than B vehicles and they were usually limited to inverters to power mobile phone chargers camping fridges etc.
You will never see 2 vehicles ever the same, every crew will mod their vehicle to suit, ingenius idea's to increase stowage is always an obvious mod and obtaining stowage racks and bins off A vehicles and then bolting or welding them to your vehicle will always give it that individual look.
BV's off A vehicles are always a good one especially for the OC's landrover and never fails to upset the REME vehicle mechanic inpsector when it come round for it's annual inspection. In fact all illegal mods have to be removed for the 12 monthly/6 monthly inspections. (unless your best mates with the inspector).
No 2 MV's look the same when prepared for exercise but when back in camp and everything has been stripped off then they will look the same-ish.
MV owners with no Military experience will try their hardest to replicate what they think is right and good luck to them, the anoraks with tape measures need to get a life, no one will ever get it perfectly right because what could be correct for one vehicle will be different to another. We should be thankful that there are people out there that give enough of a stuff to at least try and if that keeps them happy then thats ok.
I know when I finally get my own MV I wont give a stuff what people say about mine as it will replicate what I saw and did while still serving.
Great debate though.
Edited to add that some of the more ridiculous items that people add which clearly shouldn't be there are rather annoying.