Is there a way to force this update to the tech tree retroactively, after researching it? I added the mod to a game after unlocking steel furnaces, so LDS didn't get unlocked.
I might try my hand at editing the current version of the mod, adding LDS to some other random tech I haven't researched yet so I don't have to abandon the save/achievements, but not everyone may be so adventurous. Very much open to pointers, as I've never played with the modding tools before.
EDIT: Fixed it, turns out it was pretty simple to add an entry to unlock LDS, so it got tacked on to Fluid Wagons. Very appreciative of the clean code in your mod and the devs who facilitated it.