If you only buy one supplement book for edge of the Empire, this should be it.
Crafting and droid building rules are included. I have had a hard time balancing home-brew crafted items, but now we have some rules to work against. It will stop a lot of equipment power-creep discussions before they begin.
Without the brilliance of Technicians, the Star Wars galaxy would be unrecognizable. Their work has created sentient artificial beings, put the most distant systems within reach via hyperdrive, and defined the ways that wars are fought. Yet even with such advanced technological marvels, there is no replacement for good, old-fashioned, spur-of-the-moment ingenuity, particularly in the Outer Rim. There, Technicians must be as resourceful as they are intelligent, in order to invent solutions for the myriad troubles they daily face.