It was easy to set my own combination and the locks were great on their first flight.  I did notice that TSA had opened my one suitcase.  I guess they couldn't figure out what a ball winder and niddy noddy and lazy kate were without opening my suitcase and seeing my tools for spinning yarn and the fiber I had packed in the suitcase.  I carried on the spinning wheel seperate but did have my drop spindle and set of knitting needles packed in the suitcase.