I recently purchased a used BCT15 to monitor air bands. I wasn't aware that you could not update the FW with a serial cable on the rear port. I would rather not spend $30 for the cable if I would really only use it one time to update the latest and probably the last firmware version on the BCT15. That being said would anyone mind lending me the cable if I were take care of all the mailing expenses. I would even send you the self addressed envelope to make effortless on your part. After I update I simply mail it back. You can rest assure you will get it back. I can speak directly by phone or simply PM for details. It would greatly appreciated.