9:50 is the latest PS.
Edited to add: If Spectro is at 8:00, I'd make y our PS for 8:45. If you sit at the beginning of Main Street, Spectro will be over by 8:20, and you can then head to Narcoossee's. FITS will probably be at 9:00 then, and you'll have one of the best views in the World from a table at Narcoossee's. If you're table isn't ready yet, you can still go out on the deck at Narcoossee's and enjoy them.