Due to some uncertainties haven't booked my ticket to get to my flight on CX out of chicago yet. Now I am trying to book with miles an award ticket but the only flight available is an AA flight that arrives at ORD at 1 PM - that gives 2:20 until the 3:20 PM departure for the ORD-HKG flight and only up to 50 minutes to change terminals and check-in if the flight is on-time and uncomfortably less time than that if the AA flight into ORD is delayed (that is unless online check-in usually works to print out boarding passes ahead of time?). The CX ticket is on BA stock even though it is all CX flights. I don't like having this short of a connection - but might be willing to risk it if (1.) online check-in usually works, and (2.) CX usually will at least try to put me on the next flight (unfortunately a day later out of ORD) if I miss it because of AA irrops on the earlier flight. Opinions?

PS - I should add that I think I can get away without checking luggage for this trip, so that makes the connection a little easier to accomplish if I am delayed getting into ORD.