[Lynn Eades]

Bruce, The very first pic you posted is a Scout (Have any survived) The one in the left rear of the pic. you posted,post subject:" for Aussies.", is a Bren carrier. They are basically a mirror image of each other. In your first pic.(Scout) the long box lays along the top of the left guard, with armour on the right(drivers) side having a similar profile to a universal. The Bren has the long box mounted on the right guard(behind the driver) and the rear armour cuts away from the same height as the universal. The scout appears to have a high engine cover as compared the the bren.
And no I'm not suggesting this was an Aussie idea. New Zealand procured six "Brens" from the U.K. in 1938,(of which two survive) These were the basis of our L.P.(1), (Not the same as the Aussie LP1)of which N.Z. built 40. This was in 1940/41. Technology had rolled along a bit by this time and N.Z. decided to run with the very functional Aussie Pattern carrier, of which our very fastidious Mr Smith(where is he?)has much detail.
Lastly, If man in universal carrier chooses to sit with head "sticking" up, he might wake up dead!