There was an episode of 'Battlefield Mysteries' on the History Channel about Wittman's demise. Apparently the British Yeomanry opened up on his right with fireflys and took out the other tanks with him but he was over 900 metres from them. The Sherbrookes were on his left and got him with 75's at about 150 metres. Amazing what they have on TV these days.
There is a restored Grant at the Meandarra Anzac Museum and Emu Gully has a running Grant in their Air and Land Spectacular. I wonder if they have their original turrets.
Cheers
Peter