We have UA and SA partner award reservations JFK>LAX > ICN & various other Asian points. Due to a flight change time post reservation our connect time in LAX lessened. We now want to arrive LAX the day prior to ICN segment to reduce stress factor of connection. Trip is in the fall, however, right now no IN seats offered the day we need. If I book a JFK <LAX on a new reservation (with hope of forfeiting if IN appears down the line....what risks am I facing ? How best to protect both itineraries?