I've taken a break from getting the drivers to work to re-think (again!) my cnc layout, I came up with the design below. What do you guys think? The Y axis is more secure and lower down, the end plates are more substantial and will have 4 x m8 fixings each and the aluminium rail is 60 x 60 all around. I haven't added in the Y axis ballscrew yet but I think i'll put it along the top. I've also used one solid piece for the back-plate which will hopefully add a bit more strength. It needs it.. All my rails arrived yesterday and I didn't realise how heavy they all were combined :confused: