I have never liked the Jetpack design, it's rubbish and chunky. So I played around and made it look like Iornman (ish). You do not need any perks or skills to use this now, well the fusion core is still required.
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I made this edit because I dislike the jetpack design completely. It's worse than Robocop 3 (the film, it was funny at the time of release). So I've edited the FX file and removed 2 flames whilst placing the other 2 underneath the feet. I have also removed all variations of jetpacks from the game, so there is no need for Science perks etc to use this new version.
I have tested all power armor variations and it all worked as should. I had to delete Jetpack from the game so it shouldn't show up at all in any part of the game (but I cannot fully guarantee this). This is why I also include 4 jetpack nifs that are empty files to cover this issue (if it happens).
No skills are needed now, just fly up even for fun. BGD00
The jetpack is in the left and right legs of all power armour variations, so if these get damaged I'm unsure if the jetpack will still work without being repaired (the legs that is).