As a 2P (Silver), I really appreciated the 48 hour upgrade window on the PMUA flights...now that the upgrade window was moved to "day of departure", I wonder if any fellow Silvers out there could comment on when exactly that upgrade window "opens"...are we talking no EUA (only battlefield upgrades at the airport), 24 hours before flight, or maybe 12:01am on the day of departure (in which case an 11:59pm red-eye could still potentially clear at *almost* 24 hours)??? How's the upgrade % been since March? I've been using upgrade instruments such as miles to upgrade the flights I've taken so far this year, but later this month I'll be joining the regular race for the upgrades...already in E+ since I booked before the March transition so at least that's set