HomeCNC, the energy chains were bought from
RS electronics in the UK, I bought 2 meters, but could have used more. It ain't cheap though at around $25+ per meter.
jimbo, I bought a
Taig lathe for the purpose of making the linear bearing blocks, the leadscrew bearing blocks, and the AB nuts. So it pretty much paid for itself. I also turned down the leadscrew ends on it, not recommended though! If I lived in the US, I may have considered a Sherline lathe, but we don't have those over here

I wouldn't want to do that too often though!