Engineering is one of four crafting skills in SWLOR. Engineering is used to craft enhancements (often called mods), droid armor, NPC droid companions and their various parts, and Starships as well as their various modules. Skill ranks, perks, and crafting gear determine how well you craft; core attributes do not.
Engineering requires an investment of 75 Skill Points to purchase every skill within the tree, though most people would recommend only purchasing the engineering actions Basic Touch, Master's Mend, and Waste Not, bringing the total required for all recipes and must-have actions down to 68 SP.
All recipes not yet learned that are listed on this wiki are earned by defeating difficult miniboss enemies on Tatooine and Dathomir such as Chirodactyls, Rancors, Dark Side Adepts, Bounty Hunters, and Krayt Dragons.
You can find the perks for Engineering and other crafting skills here!