I was thinking about that earlier. I was going to shorten the bottom and put a vice on but then decided to reverse the Y axis to stop chips from collecting on the ballscrew and bearings. Don't fancy having a vice at the top but might shorten the bed and make provision for a 4th axis.

The cutting area I was aiming for was 1000mm x 500mm and this just about gives me this so was going to leave as is but you've tempted me to have another look