Quick question. I've had a million schedule changes on my flight to Nicaragua here in a little over a month and I just got rebooked DEN-CUN-PTY-MGA. I have a ~3 hour connection in Cancun, and I know I have to a) clear immigration and b) switch terminals. This is at least not on a weekend. Any reason for concern? I'm currently trying to change my flights to DEN-IAH-PTY-MGA, with little success.