Got a line on a used AccessPort APAP-SUB-003 version b that is complete and which the owner says is unmarried from the 2011 STI that he has already sold. Price is reasonable and the guy seems reasonable. Apparently the unit has the STI maps and a Perrin map for the STI. If I get it, is it simply a matter of downloading XT maps and the flashing my ECU? In other words, can I screw tois up and brick my car??