I'm trying to get down to Perth next week for the rugby, using AsiaMiles to upgrade. There are business class seats available for purchase, but none left for upgrades. If there are any spare seats nearer the date (Wednesday), will they then "open" them up for people to upgrade? If so, how much nearer? Is it in theory possible to go to the AsiaMiles counter at check-in and use miles to upgrade to a "revenue" biz seat? Cheers all.