Quote Originally Posted by WandrinAndy View Post
I would have thought that my design as pictured already provides lateral resistance roughly equivalent to what you're suggesting, as a cross-section of the bottom of the gantry consists of 45x45 bolted close to the backwards pointing 51mm leg of the 9.5 angle? And the 9.5 angle extrusion is bolted to both the base and the uprights of the X-carriage hopefully creating a very rigid joint?
OK then go for it.!