Use an alarm with thread (the kind that you tear off with some difficulty) and have a large flacon of superglue pour its contents with some pressure at strategic places on the bike (seat, handles, frame middle). It should be removable later using acetone. ;-) An ISD chip yelling thief! thief! I am a stolen bike! would accompany this. ;-) Peter -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu