I should have knocked on wood to avoid jinxing myself. Despite almost two months of success, we've faced a string of recent failures with Nathan's toileting. Nothing big, but discouraging nonetheless. We'll have to work on getting him to listen more accurately to his body.
The screens are just too big a distraction. Once he's earned them, he's not paying attention and if he hasn't completely finished, there will be an accident.
On the other side, our behavioural specialist has told us that it will likely be another month or two before the therapists are ready to support us in a toileting program for Alex. So I don't have to deal with the two of them at once, which I think would be more than I could handle right now.