I've finally finished updating my Cod, Butt, Collar and Back sculpts. I started these a while back, just after I'd finished updating the chest armour.
BACK: This had minor adjustments, mainly the width of the portion that goes over the shoulders and a slight change to the overall width.
BUTT: A lot slimmer (height).
COD: A lot different, slimmer, new detail (circled), dent position moved, new dent added and the portion that goes beneath the cod is longer and has more curvature.
COLLAR: wider, new dent position, new dents added, slightly shorter and the inner curvature (near the neck) now has the slight angles rather than rounded.
I hope these descriptions make sense
IMPORTANT: The new collar and back armour will not fit the old collar and back (eg. new back & old collar, won't match). I do still have the Version 1 moulds so I can still make these if needed.