Excited to see this article!
http://3dprintingindustry.com/2014/09/20/openbuilds-open-hardware-revolutionized-linear-motion/
That looks like a @Shauki carriage in the last image…
That writing is all sorts of fluff. I’m glad metal is getting more accepted. Self-replicating if a bit overblown for an ideal, especially when a chop saw is so easy and quick to use. Plastic is great for many uses, but it doesn’t make for nearly as rigid of a frame.