Shane Lovell (who has posted on this forum before, see
http://www.mapleleafup.org/forums/sh...&threadid=1496) has put out a great book on Australian Centurians in the Vietnam era. Many of the modifications to Canadian Centurions were of British origin and also applied to Australian Cents, too.
Contact Shane for a copy of his book, but I'll show a couple of detail pics here.