I see.
If he isn't happy he can always buy a file from someone else or make his own. Its not exactly hard to make a K04 file. I've seen so many shit ones actually work
Yeah, the tune for the conversion isn't that hard if you know what you are doing.
I just made a total k04-023 conversion on my car, and the hardest part was all the mechanical work.
The ECU file took under an hour