I faxed a missing mileage request form to MPC for my AA flight (I didn't see my MPC # on my AA BP so I'm pretty sure the ground staff at NRT forgot to give that info to AA when transferring me). Guess what? CX did not reimburse the AA mileage from NRT-LAX, BUT reimbursed mileage for both legs NRT-HKG-LAX. I guess that's because I paid full fare for both legs and I think they are indeed very reasonable.