Nr1 - Cheers. Thing with that suggestion is that the ball screw and mount is actually taking up more depth than the rails and carriages, so would need to do something totally different with the ballscrew arrangement.

I've been very happy with the pokeys57CNC - setup was easy, the mach4 plugin is great and support has been quick to answer my occasional stupid question.
You are of course right about the ballscrew placement! So nevermind about that :)

I'm glad you like the pokey's, might be that Im gonna place an order.. but mach4? Is it working alright as well?

The new Zaxis is looking sweet, what material are you planning on using for the "seals" in red?