Not really. It was something Dr. Hamza mentioned earlier. Anything you do to the tailings to improve water recovery--and one that was commercially applied was adding calcium sulphate to the system to improve water recovery and, ultimately, reclamation. Unfortunately, the extra calcium could hurt recovery, so they have to make sure they add the correct amount, that the recycled water doesn't kill recovery or scale up the plant and shut everything down.
So there's always that issue of what you do to treat the tailings to get more water back. You do not want it to have a deleterious effect on bitumen recovery. So that's why they're looking at different methods.