EBF3 is straightforward to understand. A metal feedstock (aluminum is apparently ideal) is heated and fed to a print head that traverses a rotating build platform. We're wondering about the rotating bit: good for making round objects, not so good for those with straight edges. Perhaps most space station parts are usually round? In any case, EBF3 also can handle two different feedstocks simultaneously, permitting custom alloy printing or having two different materials within the object. One interesting aspect is that EBF3's build chamber is a vacuum. Easy to find at ISS, less so around here.
We suspect EBF3 will eventually be known as one of NASA's spin-offs, where Earth-bound companies take on the technology and produce commercial products with it. Perhaps it may even be used by one of the leading 3D Printer manufacturers?