Not sure if this is the right place for this question, but if I am going to fly AA domestic and would like to initially use my CX Sapphire status to enjoy free check in bag and lounge access, but ultimately change to JL JMB as this short flight will perfectly take me to the next status. If I am flying CX, I am pretty sure this is going to be very safe, but given some have expressed AA FFP # being rather sticky, so I would like to hear your view. Appreciated