looks like there's us customs preclearance in dublin...dublin's airport says i need at least 3.5 hours to allow for preclearance ("We advise that you allow 3.5 hours before a long-haul flight.")...i only have 2 hours on the flight back from CDG and only 1.25 hours from JFK to CDG...am i cutting things too short? seems like aer lingus offered these itineraries, so i would have thought that if the itinerary was unworkable, they would have not offered these flights!!! thoughts?