Thanks chaps.
I've got to make a change tot he cupola armour, that is the late style, wheras it shoudl be the early style made fomr welded plate.
The other modesl in the trio will be Rubicon so I have more choice in the detail, I'll have at least one 'late style' with the cast mantlet (pig snout) I'll jsut need to look at what else I can do to maek the differnet. Thy will all get concrete armour though.