There is a crafting Iron Challenge Mission given by Tobie in Monria Hub (2nd floor). 1st- "Find a Monria Blueprint" (special option should appear when using crafting terminal) 2nd- "Craft a Monria item". Reward is engineering skills. 3rd- "Craft 100 Monria items". Reward is engineering skills. 4th- "Craft 500 Monria items." Reward is 0.75 tt worth of Engineering skills The mission keeps repeating afterwards and turns into a daily mission to "Craft 500 items" with a 0.75 tt worth of Engineering skills.