I believe that there are a few units running around with various degrees of damage on the front.
2015/2017 are the worst I think.
I think it's something like 5 hrs they are at Meeks Road.
I know that we would bring 34 into sydney and would more often than not, get that same set back to form 31.
If the Melbourne set was overly late, 34 set would go out as 35 and we would get the Melbourne set for 31. I think somewhere around here is a list of what set went out where and their change overs once that run was completed.