me with a second lock set to be used with a trailer if I ever got one and it is keyed to my ignitions keys. Here is my quandary, Do I buy a spare key and have it cut to fit the trailer or, do I try to install the new keyset that is already set to my ignition keys? I really don't like being this confused, but the more I think about it, the more confused I get. The procedure for swapping the key tumbler doesn't look that bad, BUT........thank you very much.