Let's say you're completing a PGY-1 prelim year (with the goal of ultimately finding a categorical spot) and don't have any luck finding a PGY-2 prelim position for the next year. Has anyone heard of someone repeating a PGY-1 prelim year at a different institution and, eventually (i.e. after yet another prelim year), finding a categorical spot? Alternatively, what about taking a year to do research and then doing another prelim year? Input/anecdotes appreciated.