I personally had 2 A50 TCMs brick because it's not doing a true full flash apparently. Now I see Biodiesel trying to do almost exactly what I did and no one is telling him that's a bad idea. I had bought 2 TCMs one with A50-OS-24257093-TRANS-24258956.ctz on it and tried to flash A50-OS-24259875-TRANS-24259876.ctz and the TCMs are dead now! One died in truck and was on another OS, the other one was on the bench. I wouldn't recommend full flashing the TCM until true full flash is supported? I used tool only flashing and it's no way apparent that it's not a full flash. Since no one is telling you NOT to do this even after they were made fully aware of this is beyond me. Can you chime in Ross and let me know if you think it's safe to change OS's via a full flash on A50 in EFILive's current state?