Me too I had some testing before the livery fit correctly, but error are really small, if i am not wrong it's on the aft windows that are i 1 Pixel up but after fixing those you are fine and can always use for the next work.
One of the helping thing is that you don't need to close FSX for checking the texture you just change the aircraft  and get back to see change.
The problem is the engine is part of the main texture folder and there is a logo of pratt & whitney wich i think, not all company want it and it's not on the kit but you can always fix it.
This is more a question if you create your proper engine texture it's loaded  instead of the the main one, does this create problem?

In any case is one of the most nice PK i have seen in terms of detail and i hope me too that they will add the wing and the engine too.

All the texture in this aircraft are really High and that's why is really demanding on performance. I wondering if we can find a compromise for people with less performance PC.