Originally Posted by
TrojanTraveler
You will have no problem. Plenty of time and while T1 immigration/customs can back up, 10am is usually a quieter time. If you arrive on time, I would estimate that you will be at your T4 gate no later than 11:30am.
Awesome, then that means that if all goes well, I'll have time to drop by the T4 Sky Club and eat a bit before I board.