Thanks Mark,

Yes it probably could do with a bit of shrinking vertically - easy enough to do in the virtual world :)

By the X Axis did you mean the two running left to right on the gantry? (I thought that was Y...oops) - and if yes I was also concerned about that due to posssible twisting movement being possible - I can add a new extrusion below the existing 120x30mm and move the lower rail to that - should also give more room for the ballnut and Z axis platform coupling/mount.

Copy that also on the stainless thing - I only do a bit of cutting ground shaft now and then in stainless for mounting gears and the like on, so no need to mill stuff in stainless, but I guess stainless can be done on a tougher rig? Ali is what I will mainly be working in as I said, and would hopefully like to cut 7075 (again not my primary material) - I'm not that worried about speed, as the main aim is to get shapes I just can't with hand tools/pillar drill.

Thanks for the feedback.