Thanks Wilfy

I think this one will stay MDF. I'll fix/change the sloppy bearings, which is where I get most of the movement, and then see if the MDF is moving / flexing at all. But at the moment, I cant see any movment in the gantry or risers. Remember, it's intended to cut wood ! If I want to cut metal, I'll build one to suit.

I'm saving for another driver/motor kit and I'll be building a 8' x 4' working area machine. I'll be making that in MDF or PLY too, as this "test" build has proved it to be sufficient.