This thought came to my mind and well I would like to share it since I think its really useful suggestion. Here goes: by using 3d printer, you could enable the creation of custom shells for robot. Imagine personalizing the robots by their duties. A mining robot with the skin of cobblestone and farming robot would go with the appearance of tilled dirt or leaves for timber robot. I dont know how hard to make this but it would enhance the use of 3d printer for robots (perhaps drone to, not sure.)
The assembler could have one more slot as shell/skin slot where you can insert 3d printed blo