I was entertaining a new hire while my coworker (who is her primary trainer) was in a meeting. At the moment I was working on that imposition with the composition tool. While describing it’s not-monolithic processes, and the comparison with InDesign coupled with SmartStream, I had an ahah moment. At the time I was still trying to impose huge files into a 5up dutch cut in one pass. What if I impose one sheet at a time and then imposed them after the fact. This worked.