Nice work Kenny, I've got one of these on the go, come to a bit of a halt though.
The canvas mantlet cover should be there, the picture you refer to has the stillbrew uparmour package that's why it's difficult to see, don't go by the Tamiya box art they used details from various Chieftain marks during kit design.
Out of interest the officer who designed this scheme had some good ideas. The colours and block sizes were not random but designed to be same sizes as urban doors and windows, all tanks had exactly the same colour and pattern (also some light vehicles) to confuse the Russians as to vehicle numbers. Landrovers look cool in this scheme!
http://www.emlra.org/articles/berlin_brigade.htm
Here's some more pics
http://www.militaryphotos.net/forums/showthread.php?155668-1982-83-Berlin-Brigade-Camo
"Don't mistake lack of talent for Genius"