Out of curiosity, why is Crafting/Slicing the skill that determines the success in installing doors? It seems that the Repair skill might be more closely related to that action. Consider that if one is skilled in ship repair, that means that person knows how to use tools and understands the structure of ships enough to be able to fix damage. That seems more closely aligned with door installation than the ability to craft a keycard, sew a force robe, or pick a lock.