It's a bit of a chicken-egg case for me really. I need the machine before i can do the machining, so the less i have to do on the machining part, the better.
I intend to build everything from profile and then machine my own plates and reduce the machine footprint.

Thanks a lot, it is very useful. Lovely machine Steve!

Lee has kindly suggested a few companies already in a previous post. I think this company was one of them, which will probably be the one i will get it from. They have 6mm and 8mm groove range which i think the 15mm will be OK on.

(... now stuck reading Steve's build)