Bish
James, the bits attached to the rear of the turret, is that just stand off armour?
That is what it is. Something to give the rear of the turret a bit more standoff protection. Interestingy, the framework there was designed so that the supports for the extra armor there could hold one of the original stowage boxes, too.
Also, the forward most 'block' on the turret front left, the one with the big springs on it, was designed so that it could be raised up fairly easily to allow the driver to use his hatch, which would be blocked otherwise.