Hi Clive, thanks for the reply.

I am designing as we speak. I use Autodesk Inventor for all projects, so I'll draw something up and post it here, hopefully later today.

Am I right in looking at sellers such as: http://www.aliexpress.com/store/prod...287879562.html ?

Am thinking the above (or the same from elsewhere) with a central stepper and timing belts to dual ballscrews for the X axis. I believe this is fairly standard.

Cheers,
Ellis