I recently got a discontinued BNSF GP38-2. In comparison to the one I just bought last year, the older one has a bright white LED and also the speed control is faster on the bottom end. Whereas the newer one has a soft white LED and takes more voltage to match the same speeds. So did AZL make running changes to their boards out of a response to some issue or did the seller change the board out to an aftermarket one? Could I have gotten one with a DCC board? I did notice the electrical isolator tape from the motor tabs to the chassis.