I manage a small skating rink and we are looking to rekey. We were able to obtain a large amount of Best SFIC locks of various types; I assume they were removed from somewhere else that was rekeying. I only have the change keys for all of the locks. If I sacrifice one of the padlocks (or any other core) I can decode it and make a control key, but can I glean enough info from the pins to decode the master (or higher) key(s)? Thanks in advance for any info you can give me.
Tim
P.S. What is the "acceptable" practice in use for control keys? Some of our locks are stamped "Y.a", "Y.b", "X.a", "X.b" (where X and Y, and a and b are numbers 1-9) and so on. Would the "Y" locks use the same change key as the "X" locks? I would speculate that some of the X locks may use the same master (or higher) key as some of the Y locks, but have no way of knowing yet.