For many former couples, it is possible to avoid the stress and expense of litigation by sorting out a solution to their differences about children’s arrangements through mediation, collaborative law or good old-fashioned negotiation. For others, litigation can be a bruising but time-limited ordeal, which ends in an order imposed by the judge, which all parties then abide by. Yet there are some cases that seemingly never end. One of the problems in making arrangements for children is that they will grow up and change, and their routines usually need to adapt too, meaning that trying to find finality in…