@Philip *********
that's the down side, you can't queue up at the immigration office (the appointment system is STILL down) and also wait for the bank to open too. They both open at 8:30 (actually they let you in to the immigration office just before that)
You're stuck, you either just blow off getting in the immigration queue until after you get the bank letter; which if you are there at 8:30 you should have by 9:00-9:10 and then go up and take your chancs with the queue upstairs. OR you get it the day before at your branch, show up and just update your bank book downstairs WHILE you're in the immigration queue upstairs and get in when they open.