If you need to grind for S-Class freighter upgrades, check out the Derelict Freighter Registry. It even has the Fuel Efficiency and Hyperdrive bonuses listed. All the freighters are in Euclid.
I am not the owner of the registry, just promoting its use. I originally found about in this Reddit post:
Agreed. Lemmy doesn’t have a very compact layout (at least on a desktop browser) so I’ll probably use just a single sticky post with resources, and use that to link to individual guides.