(17 Jan 2014, 9:08 am)Kuyoyo wrote 5255-60 are the ones for the 50, as for which red ones stay and which ones goes I don't known but others on here might do.
So to clarify what you are saying.
* 5255 - 60 are for the 50.
* 5250/3/4/73 plus one of 5247/8/9/74 are for the x30/31.
* The remaining 3 are spares of some description to cover 3 out of the 4 routes.