one of contractors that was down at the port had track machines in the boat. 20t machines usually end of last year he went out buying a new to him machine and they asked the salesman for a 20 odd ton machine. he pointed at a case 160 digger. they looked at him with puzzled faces asking if he did not know what a 20t machine was. he said them and a lot of other makes and models are a lot heavier these days compared to whats on the bonnet as the 160 was a 19t machine. they bought it and he was right. bucket on, full tank of diesel, driver of the crane lifting the digger into the boat said it was over 19t