I did a bit more fiddling with this by modifying the config files for interstellar engines. Removing fuel requirements, raising crash tolerances and heat tolerances and even giving it more thrust. And even with that in the game the engines produce no thrust.. its only Interstellar engines, KW, stock engines, B9 and the rest work perfectly fine. And also none of the reactors work for interstellar regardless of what I do, (ive tried everything) Am i seriously the only one with this problem? Could this possibly have something to do with the resources and not the engine?