I am having an issue running this on [0.95.1a-RC6]. while the modspecs can be found and learnd they don't appear in the mods list on the refit screen.
Also the mod_info claims the game versions should be [0.95a-RC15] while the forum post topic lists it as [0.95.1a].
Preemptive answers: Yes, I tried running this mod alone without any others on a new save.
Edit: Did some snooping of my own in the files. I noticed some differences with the vanilla hullmods.csv file. You had 2 "tech/manufacturer" fields instead of one. The first being empty like the vanilla file the other being filled "unusual". It appears that in [0.95.1a-RC6] the "tech/manufacturer" field is empty for all hullmods. Any hullmods that have anything there does not appear in the "add hullmod" list for some reason unknown to me.
So I just deleted the column with the "unusual" and they appear, now the default "Common" as everything else. I can finally do more stupid things in my brutal sector+starpocalypse+1ship fleet run that I installed this for. Yey!
Edit 2: I noticed that all other mods have the same issue. Except the hullmods that are marked learnt when starting the save, hullmods with a non-common manufacturer don't appear in the "add hullmod" menu after you learn the modspeck.