i wanted my big blokie (if there is such a thing in the guard (except ogryns of course)) to have the ability to survey the battlefield from the relative safety of his own command vehicle so i extended the hull backwards by removing the rear part of another chimera in front of the barrel housing, and removed the rear tread from the toer chimera behind where the barrel sits this added an extra 1 1/2'' to the length of the chimera then added chain link to give it a little bit of extra armour

front left view

front right crew compartment view

full view right side

side chain link view