Just looking for some recent information... I am doing a turnaround in MAD in a couple of weeks, arriving and departing from T4S. Arriving on IB and departing on AA, if it matters, on different tickets with a four-hour connection. Is it possible to do a quick turn in T4S these days? Or will I need to enter Spain, go back to T4, and reverse to get back to T4S for my departing flight? Thanks!