Like that Idea, I noticed on Jonathons this idea was used, but disregarded its main advantage. This way I could buy, say 2m x 1m setup now. make the gantry 2m and the x axis x axis 1m. If its as successful as I hope I can then re-make the x axis longer. Need to think of a cunning way to make the rotating housings... I can worry about that at a later date. Going to start from scratch in sketchup again. this time with my newly quoted 60mm steel box from Adey Steel, and with the new design wide gantry and static screw.