Rack Robotics ought to have some relieved backers in the coming weeks, as they finally move towards shipping their Betta Wire 4-axis WEDM machine.

We mentioned Rack Robotics Powercore 3D printer conversion kit in Upcycle a 3D Printer in Make: Volume 92. It was an impressive feat for desktop manufacturing, and they successfully delivered units to backers. The Betta Wire, announced in 2024, is a kit purpose-designed for far more accurate EDM cuts, and made to fit inside an off-the-shelf aquarium.

In case you missed the history, Betta Wire was the victim of one delay after another, seemingly caused both by technical issues and scope-creep. (We’ve all heard “don’t let perfect be the enemy of done,” but sometimes even “good” can be enough to get in the way.) As Cooper explains in the latest post , the other two founding members left the team in November 2025.…