Just received my TMC tune from the mail. I also ordered JB but I made a mistake of ordering the wrong harness, so I had to sent the harness back and wait for the right one......
And here it is installed in the engine compartment.
Installation was fairly strait forward according to the included guide. This unit was for the F12 650i which had the N63 engine. I inquired about the unit for N63Tu in the gran coupe and was told to use the same unit.
Just installed yesterday afternoon and didn't have time to really test it yet. But no engine light or any fault lights so maybe I will try the car today......