I have to echo those comments and really compliment you on your accuracy and range of work - superb. A man after my own heart (even if I am not an FSX user!)
Ianf77, according to my reference, the green/white/lion rampant roundels appeared as part of the AFZ (Airforce of Zimbabwe) transition, and were not seen on even the later-era RhAF Canberras. It also leads me to believe that by the time the total lack of roundels and markings occurred in 1981, it was well and truly AFZ.
I will say though that I am not an Rhodesian/AFZ Canberra expert, and may be wrong, but this is what on Target Profile 11 shows.
Regardless, superb work Henry.
Steve