After fiddling about with this tool, although having great fun, I would like to propose the option to create double or triple headed locomotive hauled consists and maybe even a mix of multple locomotives from your available stock being hauled dead by a single running locomotive. I speak specifically for UK routes. eg Class 66 hauling a dead load of various locomotives or a pair of 37s pulling a heavy load. Perhaps this is already planned, but if not, I hope it can be done.