All –                 In case anyone is looking to replace the barrel cam lock on their 5170 PC/AT, it’s fairly easy. Look on eBay (picture attached, hopefully) or elsewhere for a 3/8” depth, 90-degree cam lock with the key removable in both positions. You will need to recycle the locking bar from the old lock and may need to bend it slightly to clear the internal metal part of the enclosure top. Works like a charm. Rich -- Rich Cini http://www.classiccmp.org/cini http://www.classiccmp.org/altair32