I was under the impression that the Enigneering RNG has been removed?
I'm currently building the same ship as a friend (Krait phantom) and i'm 5-6LY short of him, even though i basically have all parts. I've checked coriolis for details and noticed that his FSD has a way higher "Optimal mass" of 1856T compared to my 1655T. Both are Grade 5 with Increased Range and Mass Manager.
Left is his, right is mine.
I'm currently building the same ship as a friend (Krait phantom) and i'm 5-6LY short of him, even though i basically have all parts. I've checked coriolis for details and noticed that his FSD has a way higher "Optimal mass" of 1856T compared to my 1655T. Both are Grade 5 with Increased Range and Mass Manager.
Left is his, right is mine.