Hi,
If you've made this soundmod from your own downloaded samples / scratch, that definitely deserves congratulations, as this sounds quite good.
However, if your aim is to be realistic to the 787B sound, it sounds a bit off to me... It is like the engine is too low pitched, especially in the inboard... or as if you had missing 1-2k RPM... May I ask where you got the samples ? If you check that real life inboard for instance, you can see that Kunos quite nailed the sound : with the transmission and the typical pitch of the engine :
https://www.youtube.com/watch?v=neHfmMeRr9Q&t=131s
Maybe it's just because your mod is still WIP ? I don't want to be too b*tching about it...
One last thing, do you have any sort of social media, like a discord or something ? You made an incredible Zakspeed Capri soundmod, and I have quite some audio samples for many sports and race cars, only awaiting for someone to create soundmods for them... sharing them for free, sometimes even real life professionnal recordings.