I had an interview scheduled last year at my home airport. I decided to call the MEM guys during a day turn and they just said come on over. Their office is next to the Democrat lot and they said they'll just do it on the spot for FDX guys without having to make an appointment. It took 10 mins. Also, if you can get a NFCU Signature Visa, they will reimburse your Global Entry fees for every cardholder on your account.