Bruce,
I don't know how much creedance I can add.My dad who was the RCASC CMP C60 ammunition truck driver(his photo is in The Liberation of Holland book sitting on a motorcycle in front of a convoy of C60's in 1945) drove Smokey(in the cab for warmth) in Italy back to the rear after the action and told me that Smokey was wearing a pair of black coveralls over his battle dress and that Smokey mentioned to him that he got the first tank,with infantry all over it,in the soft underbelly as it rose up out of either a hole, ditch but I somehow remember him saying a shell crater in front of the bridge approach,as it neared the bridge, with a piat and thereby blocked the way of the second tank following.I think ,as my father reinterated,Smokey then sprayed the infanteers who were riding on the first tank.As him drove him back from the front,all Smokey wanted was a cup of tea..
Hope this somewhat first hand account helps for your diorama.