New build – input/comments appreciated

[ngundtoft]

It seems I am getting close to having a mechanical design that will fulfill my requirements. However, there is still one point on my list that I need to look into. I would like to have some kind of adjustable bed. I will mainly be working with wood, so I think an MDF plate will be sufficient for that, and also with wood the fairly long Z-axis will not be a problem. But for aluminium I think it will be good to lift the bed for better stability. This bed could be smaller and also have provision for clamping the work material.
Something like this:

If anyone has come up with a mechanically good construction for raising/lowering the bed, I would love to have some info/links.