Originally Posted by
skiflyer
...So if 1 hour is the generally accepted min if things go well, 2 hours might not be such a bad idea since thing rarely go as planned?
I wouldn't say rarely -- they go right most of the time but are you OK with a 10%, 20%, ... chance of a problem?
One hour will be better than 33 minutes and 2 hours even better, the day before even better yet -- but only you can make the tradeoff of waittime versus potential issues.