I am looking to build a large format cantilever printer and want a very stiff z gantry. The C-beam does appear to be stiffer than v slot when force is applied in a direction that is parallel to the gantry plate. However, what about motion applied in a direction that is perpendicular to the gantry plate? I would want to mount it so the channel is facing the bed with the x rail extending from it. Is it stiff enough in that direction for the configuration I talked about? Or would it be necessary to mount it so the channel is perpendicular to the bed?