CHC AVL

I never look things up but was really tempted to see whether QUITO or LAPAZ or NEPAL qualified as answers to "roof of the world" -- I had them all penciled in at one point, along with the ultimate answer. Also, the NW corner was misleading me into answering straight clues with quirky answers, as I was convinced for a while that "All-star group" was ORION.

28D should have simply been clued [ Al _____ ]. Too clever by half IMO.

I finished the puzzle without help (except for looking up the definition of sobriquet) but after minutes of consideration, I still don't understand the answer for 46D "Time out".