The capacity really is the main issue, in terms of cost.

The second is lack of privacy, in terms of attractiveness. 6-people-per-cabin couchette cars have sufficient capacity, but the market isn't quite there anymore.

We basically want to get as many cabins as possible in railcar (to reduce cost), but they're are comfortable and private (to increase attractiveness). With these levers, you can change the operating margin from -15%..-10% to around 10%.