Flying A380 for first time since 2014 this week in CW. One of us is very tall & have selected 51F for rtn on UD (have flown this before). We thought about trying the main deck for outbound as flight is quiet. Can you see the engines from row 11? (Advice in wiki is no, only row 10). Any thoughts on main deck? Drawback is toilets at rear and v close to WT cabin: Do Y pax pop thru and use them, causing queues?